
Colorado Sales Tax License: Essential Details For LLCs (Apr. 2026)
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Launching a Limited Liability Company (LLC) in Colorado offers several benefits, including a supportive tax environment and access to a skilled workforce. That said, operating legally also requires meeting specific licensing obligations, particularly those related to taxation.
A Colorado Sales Tax License is mandatory for any business involved in the retail sale of tangible personal property. Individuals who operate strictly as wholesalers may also obtain a license specifically for conducting wholesale transactions.
Understanding how to properly manage tax licensing is an essential step when forming your LLC. It also sets your business up for sustainable success within Colorado’s dynamic business environment and helps you clearly understand how to get a sales tax license in Colorado.
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Colorado Sales Tax License Overview
Important note: Not registering does not remove your tax obligations. Your LLC is still fully responsible for all Colorado Sales and Use Tax that should have been collected, even if you never obtained a permit and never charged customers.
The state can assess the unpaid tax directly against your LLC, along with penalties and interest, in addition to the penalty for failing to register.
If your LLC sells physical products or taxable services to customers, whether through a physical location or online, Colorado law requires you to obtain a Sales Tax License from the Colorado Department of Revenue (DOR), as mandated under C.R.S. § 39-26-103(1)(a). This license authorizes your business to collect and remit state Sales Tax, which is imposed at a rate of 2.9%.

Note: These licenses apply only to state-collected tax jurisdictions. If your LLC operates in a home-rule city, reach out to the city directly for its specific licensing requirements. For a full list of these cities, refer to this resource: Find out which cities are home-rule.
In addition to engaging in taxable sales, the requirement to obtain a Sales Tax License depends on whether your LLC has nexus in Colorado. Review my table below for a brief overview. I will explain in more detail further below.
| Nexus Type | Description |
|---|---|
| Physical presence | Maintains a place of business in Colorado directly, indirectly, or through a subsidiary. |
| Economic nexus | Retail sales of tangible personal property, commodities, or services delivered into Colorado reach $100,000 or more in the current or previous calendar year. |
There is both a registration fee and a renewal fee for a Colorado Sales Tax License:
- The total initial cost for the first location is $66, which includes a $50 deposit and a $16 license fee. Each additional location requires a $16 license fee.
- Sales Tax Licenses expire on December 31 of odd numbered years, such as 2023, 2025, and 2027, unless revoked earlier by the Department. The renewal fee is $16 for each business location.
These requirements and fees are explained in more detail later in this article.
1. Sales Tax License Filing Methods
There are two approved methods for submitting your application:
- Online through MyBiz.Colorado.gov.
- With a form, by completing Form CR 0100 and submitting it by mail or delivering it in person to the Department
I will provide you with detailed instructions to fill out both the online and a physical form in the sections below.
Note: Email applications are only permitted for Withholding Account filings. For this reason, the email option is not included here.
Keep in mind that processing times vary depending on the application method you choose. In some cases, the total processing period can exceed two months. Therefore, it’s important to carefully consider your anticipated sales start date before applying for your LLC’s Sales Tax License.
Note: Mail applications must include valid identification, and the same requirement applies to in person registrations at the Taxpayer Service Center.
Accepted IDs include a Colorado or out of state driver’s license or ID, U.S. or foreign passport, permanent resident card, naturalization documents, or military ID.
If someone other than an owner, partner, member, or officer submits the application, a photocopy of that person’s valid ID must also be provided.
1. Online Filing (Same Day)
2. Direct Submission (Same Day)
3. Mail Submission (4-6 Weeks)
How To Obtain A Colorado Sales Tax License Online?
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Visit MyBiz.Colorado.gov to register and receive your Colorado Account Number on the same day. Before applying for a Sales Tax License, you need to create an online DOR account. You can use your LLC’s EIN to set up this new account.
Essentially, the portal guides you through five steps to complete registration. All entered information is automatically recorded by the system.
- Introduction and profile.
- Business information.
- People associated with your business.
- Company activities.
- Attestation.
Now press “Start” to process your filing.

Disclaimer: Based on the information you provided, your application process may not follow the same sequence as the example. However, the LLC-related questions will remain the same.
1. Licensing Questionnaires
Before applying for your Sales Tax License, you will be asked to answer questions about the filer’s details.
a. Pre-Filing Questions
In this section, you will need to walk through 4 steps:
a1. Confirm Business Filing

First, you’ll be asked to confirm that your LLC has been registered with the Colorado Secretary of State.
a2. Answer Recruitment Status Question

Check “Yes” or “No” in accordance with your LLC’s operation.
a3. Enter Login Information

Next, enter your preferred login details in the required fields. You may also sign in using supported social media accounts.
a4. Check Your LLC’s Trade Tax Status

Select the appropriate box to indicate your LLC’s chosen tax status.
b. Portal’s Information
You will be directed to the information sheet of the portal. You will need to read through 4 notifications, including:
b1. Available Process

At this stage, the portal will prompt you to create your LLC’s Sales Tax Account.
b2. Identification Proof Requirements

You need to provide valid identification during this step. Keep your LLC’s EIN ready, as it is required for account registration.
b3. CDLE UI Account Requirements

Several informational screens explaining MyBiz features and Colorado regulations will appear. You may skip these by clicking “Next.”
b4. Sales Tax Requirements
You can check the requirements to obtain a Colorado Sales Tax License here. As notified on the screen, to complete your application online, you will need to prove that:
- Your LLC sells or rents taxable goods in Colorado.
- Your LLC has a physical location in Colorado.
- Your LLC’s first date of sales is within the prior year or up to 90 days from the date you submit this application.

In case your LLC has no physical nexus in Colorado, you will need to complete the form CR 0100 and submit it via mail or in person. I have provided you with detailed instructions to fill out the form CR 0100 in the sections below.
2. Enter Your LLC’s Information
At this stage, you will answer multiple questions about your LLC’s details. Ensure all information matches your Articles of Organization.
a. Physical Colorado Location

First, confirm whether your LLC operates from a physical location in Colorado.
b. Unemployment Account

Check the “Yes-No” box in accordance with your business operation.
If you select Yes, you’ll then be prompted to answer many questions relating to your LLC’s unemployment account, which comprises:
- Your LLC’s plan to file IRS Form 1099-MISC for payments made to individuals.
- Your LLC’s unemployment insurance coverage.
- Your LLC’s involvement in recruitment during a specific calendar week.
- Your LLC’s reporting of partial employment information.
c. Business Type Designation

Select your business classification as an LLC from the dropdown menu.
d. Sales Tax Verification
At this step, you will need to verify that your Employer Identification Number (EIN) has not been used to register for another Sales Tax License in Colorado.
d1. Verify Account

Since this is your first application, verify your EIN has not been used for a Colorado Sales Tax Account. Press “Verify Account.”
d2. Enter Your EIN
Enter your LLC’s EIN in the FEIN box and press “Verify Account.”

You may then continue with your Sales Tax Account application.
e. Sales Tax Number

Confirm that your LLC doesn’t already hold an existing Sales Tax Number.
f. What You Will Need

The average application for Sales Tax Licenses takes approximately 20 minutes to complete. Avoid refreshing the page, especially if your internet connection is slow.
g. Business Name On Record
At this step, you will need to insert your registered LLC name.
g1. Enter Registered Name/ID
Enter your officially registered LLC name. Your entered name must be aligned with the name that appears in your Colorado Articles of Organization. Learn more in my article on Colorado Articles Of Organization.

g2. Check Your LLC’s Recorded Information
As you input your LLC’s registered name, you will find your LLC’s recorded information pops up in a table.

Check the information table. If the information is incorrect, click “Amend your filing with the Secretary of State.” If not, press “Next.”
h. Do You Have Worksites?

State whether your LLC operates at other locations in Colorado. Keep in mind that each additional location in Colorado requires another Sales Tax License, costing $16.
i. Enter Owner Or Partner Details
At this step, you will need to provide your LLC’s managers/members’ information through 2 actions:
i1. Add Owner/Partner
Press “Add Owner/Partner” to start your filing.

i2. Complete The Information Sheet
As the information sheet pops up on the screen, you will need to fill out the blank boxes with your LLC managers/members’ information.

Provide full names, Social Security Numbers (SSNs) for individuals, and EINs for entities. Additionally, include each member’s official title.
j. Special Situations

Proceed to the next section if no special circumstances apply.
k. Withholding

Answer the questions related to your LLC’s wage withholding information.
l. Exemption

You may skip this step by selecting “Next.” We strongly recommend consulting a professional regarding unemployment insurance premiums to get the most accurate information.
m. Tax Filing Type
Select your LLC’s tax filing type carefully. Ensure it matches your EIN-registered information.

Note: By default, LLCs operating in Colorado do not pay federal income tax at the entity level. Instead, profits and losses pass through to the members, who report and pay taxes based on their ownership share on their personal tax returns.
LLCs are taxed by the IRS according to their ownership structure:
- Single-member LLC: Treated as a sole proprietorship for federal tax purposes.
- Multi-member LLC: Treated as a partnership for federal tax purposes.
An LLC may also elect to be taxed as a C corporation or an S corporation by filing the required election forms with the IRS.
n. FEIN/EIN
You will need to confirm that your LLC has acquired an EIN/FEIN and input the data.
Note: To get an EIN, you can apply quickly and for free using the official IRS website.
n1. Confirm EIN
Press “Yes.”

n2. Enter EIN
Input your LLC’s EIN to continue the account setup.

o. Mailing Address
Enter both your Mailing Address and Place of Business address. A P.O. box is allowed for mailing purposes only.

Verify your mailing address by pressing “Verify Address.”
You can use the mailing address that is registered in your Colorado Articles of Organization by pressing “Use Existing Address.”
p. Physical Address
You will need to provide your business location’s physical address information, as well as the key contact of the location, at this step.
p1. Enter Physical Address
As for your Business Address, it needs to be a verified physical location. This verification is required before you can move on to the next step.
You can use the physical address registered in your Colorado Articles of Organization by selecting “Use Existing Address.”

p2. Enter Location’s Contact Information

Finally, enter your location’s contact details as the primary point of communication.
3. Declare Your LLC’s Business Activities
You must notify the Colorado DOR about your LLC’s business activities, including:
a. Primary Activity

To do this, select the category that best aligns with your LLC’s daily business operations.
b. Products And Services Selection

Next, complete the questionnaire about your products and services. Keep the following definitions in mind:
- A marketplace may be physical or digital. It can include stores, booths, websites, catalogs, or sales applications, for example. These platforms are used to sell, lease, or rent personal property, commodities, or services.
- A Marketplace Facilitator refers to an individual or legal entity that runs a marketplace.
c. Products And Services Details

Provide a short description of the products or services your LLC provides.
d. Choose A Sales Activity
Choose the option that best describes your LLC’s sales activity in the dropdown box.

e. Filing Frequency
You can choose to file your sales tax annually, quarterly, or monthly by selecting an option in the dropdown box.

f. First Planned Day Of Sales

Now, enter your intended start date for sales. This date must fall within one year before filing or no more than 90 days after submission.
g. Months Of Operation

Lastly, specify your LLC’s operating months. If your business is seasonal, confirm this status and list the months you will actually be operating.
4. Give Your LLC Members And Employee Details

During this step, you’ll be asked to confirm if your LLC takes on non-partner employees.
5. Confirmation Of Authorization
This step is the last one. You need to validate that you are authorized to submit the application and confirm that all provided information is accurate.
After that, you can proceed with submitting payment for your license application through 2 main actions:
a. Attestation

After entering your registration details, verify your authorization and confirm all information is correct.
b. Payment

The system will then post the fee to your account, completing the filing process.
b1. Select A Payment Method

The National Identification Card (NIC) secures your payment information. You can pay using:
- A debit or credit card.
- An electronic check.
b2. Enter Billing Information

Finally, enter your details as the filer. The portal processes your payment and issues your license within one business day.
How To Submit The Sales Tax License Application (Form CR0100)?
As explained earlier, you can get your Sales Tax License by completing Form CR 0100. You can then file it with the DOR by mail, email, or in person. Alternatively, you may apply online through MyBiz.Colorado.gov.
Below, I’ll walk you through a clear, step-by-step guide to help you complete Form CR 0100 effortlessly.
To begin, download Form CR 0100 from the section above. The form contains six sections, labeled A through F. I’ll explain how to accurately fill out each section using your LLC’s specific details.
1. Section A
In this Section, you will need to complete 3 main tasks:

a. Box 1: Reason For Filing This Application
In Box 1, select “Original Application for a New Business” as your filing reason.
b. Box 2: Indicate Type Of Organization
Then, check the “Limited Liability Company (LLC)” box to designate your business type.
2. Section B: Business Information
In this Section, you will need to walk through the following steps:
- Enter your LLC’s basic information.
- Provide your LLC’s place of business.
- Provide your LLC’s mailing address (if different from the principal address).
In Section B, since you are filing for your LLC, leave box 1 blank.
a. Enter Your LLC’s Basic Information

Complete lines 2a and 2c using the LLC details exactly as listed in your Articles of Organization.
If your LLC has a fictitious name, you can enter it in line 2b.
b. Proof Of Identification
On line 3, choose one of the permitted identification options.

All sales tax and withholding account filings need to include valid identification. Approved forms include a Colorado driver’s license or state identification card, and an out-of-state driver’s license or identification card. You can also provide a United States passport, a permanent resident card, United States naturalization documents, or a military identification card.
If the application is completed by someone other than the LLC owner, partner, member, or officer, more information will be required. That said, a copy of valid identification for the owner, partner, member, or officer who signed the application must also be included.
c. Principal Place Of Business
Then you will need to fill out lines 4, 5, and 6 with your principal place of business information.

c1. Enter Your Principal Place Of Business Details
Next, enter your Principal Place of Business details in lines 4a, 4b, 5, and 6. Again, ensure this information matches what appears in your Articles of Organization.
Keep in mind that a P.O. box isn’t accepted in this field.
c2. Select Email Notification Options
You may also select your preferred email notification options by ticking the relevant boxes.
d. Mailing Address
If your Mailing Address differs from the principal address, provide the details in lines 7a, 7b, and 7c.

e. Enter Your LLC’s Officers

You have to list your LLC member in lines 8a, 8b, and 8c. These fields are required and should contain the exact details shown in your Articles of Organization. If your LLC has more than 1 member/manager, you can add additional members/managers in other papers.
f. Business Acquisition Or Purchase

You can skip lines 9a, 9b, 9c since your LLC is newly established, not purchased or acquisited.
3. Section C
In this Section, you will need to walk through the following steps:
a. Indicate Type Of Sale
At Section C, select your LLC’s type of sale (retailer or wholesaler) by ticking the appropriate boxes in line 1.

b. Enter Your LLC’s Expected Tax Filing Frequency
You will need to provide the information regarding your sales tax filing frequency.

b1. Line 2a: License Start Date Or First Day Of Sale
Then enter your projected start date in line 2a. Ensure this date falls no more than one year before your filing date and no later than 90 days after it.
b2. Line 2b: Filing Frequency
Next, choose your preferred sales tax filing frequency in line 2b.
Beginning January 1, 2026, retailers will no longer be permitted to retain the state sales tax service fee. That said, retailers may still qualify to keep service fees for certain local jurisdictions.
You can review local jurisdiction service fee rates in the DR 1002 publication.
c. Complete The Sale Questionnaire
In line 3, you need to answer all questions related to your LLC’s products, services, and business activities. You can do so by selecting the appropriate checkboxes.

- A marketplace may be physical or digital. It can include locations such as stores, booths, websites, catalogs, or sales applications. These platforms sell, lease, or rent tangible goods, commodities, or services.
- A Marketplace Facilitator refers to an individual or legal entity that operates such a marketplace.
Note: If your LLC sells both medical and recreational marijuana, you must submit a separate application for each category.
d. Provide Your LLC’s Specific Products/Services Information

In line 4, provide a concise description of your LLC’s products, services, and/or overall business function. These details are used to assign the correct North American Industry Classification System (NAICS) code. Additionally, they ensure you receive accurate tax information and updates relevant to your business type.
The NAICS field is optional, and you may search for your appropriate NAICS code at http://www.naics.com/search.
4. Section D

In Section D, check the boxes if your LLC hires workers or is required to register for a wage withholding account.
5. Section E

Section E will show the coverage period, which the DOR completes. You can confirm the fee using the previous table or the Standard Retail License reference.
- Your state sales tax deposit equals $50.
- Your tax license fee is $16, whether you register as a wholesaler or retailer.
- The total amount due is $66.
Submit your payment to:
COLORADO DEPARTMENT OF REVENUE
P.O. box 17087
Denver, CO 80217-0087
6. Section F

Be sure to carefully review your form before proceeding to Section F.
Once the form is complete, sign it, include your official title, and enter the filing date in Section F.
Colorado Sales Tax License Other Requirements
1. Seperate License For Each Business Location
As stated above, pursuant to C.R.S. § 39-26-103.(2).(a), a retailer that operates two or more distinct business locations within Colorado must obtain a separate sales tax license for each location.

2. Display Rule
After obtaining or renewing your Sales Tax License in Colorado, you’ll need to present it in a visible area at your place of business. If your LLC operates from multiple locations, each site should show its own Sales Tax License.

Who Must Obtain A Sales Tax License In Colorado?
A retailer must obtain a Colorado sales tax license whenever it has nexus with the state, meaning it is considered to be “doing business” in Colorado.
Nexus is established either through a physical presence, such as selling, leasing, delivering, or conducting any activity in Colorado related to taxable goods or services, or through economic nexus, which applies when the retailer, despite having no physical location in Colorado, exceeds the state’s annual threshold for retail sales made into Colorado during the current or previous calendar year.
1. Physical Presence Nexus
A retailer is considered to be doing business in Colorado, and therefore must meet all state sales tax licensing and collection requirements if it maintains any place of business in Colorado directly, indirectly, or through a subsidiary. This includes locations such as offices, warehouses, distribution centers, salesrooms, storage facilities, or even the home office of a Colorado-based employee.

2. Economic Nexus
A retailer with no physical presence in Colorado is subject to Colorado sales tax licensing and collection requirements once it exceeds the state’s economic nexus threshold, which is met when its retail sales of tangible personal property, commodities, or services into Colorado reach $100,000 or more in either the current or previous calendar year. All retail sales count toward this threshold, even if some sales are not taxable.

If a retailer was below $100,000 in the prior year but surpasses $100,000 during the current year, it must obtain a Sales Tax License and begin collecting Colorado Sales Tax starting on the first day of the first month at least 90 days after exceeding the threshold, and it is liable for all applicable tax on subsequent sales even if it fails to register on time. If the retailer exceeded $100,000 in the prior year, it is required to be licensed and collect Sales Tax for the entire current calendar year.
When And How To Renew Your Sales Tax License?
Keep in mind that Sales Tax Licenses expire on December 31 of odd-numbered years (Such as 2023, 2025, and 2027). This remains true unless the Department revokes them earlier.
The renewal fee is $16 for each business location.
You have three available methods to renew your Sales Tax License, which I explain in the section below.
1. Online Renewal
You can complete your Sales Tax License renewal through Revenue Online using the same account created during your original application.
Note that submitting a payment alone doesn’t renew your license. If you don’t yet have a Login ID, you need to create a sales tax account before your renewal deadline.
You can pay the $16 renewal fee for each license using an e-check or credit card. Completing the renewal through Revenue Online gives you an email confirmation, along with a list of all licenses successfully renewed. When you renew online, you don’t need to submit a paper renewal application.
2. Electronic Funds Transfer Renewal
You can also renew your Sales Tax License through Electronic Funds Transfer (EFT). When using EFT, the payment itself functions as both the renewal request and the application. Therefore, you’re completing the renewal process in one transaction. To proceed, visit the official EFT webpage.
If you renew through EFT, don’t submit a paper renewal form, as this would result in duplicate filing.
3. Paper Form Renewal
Alternatively, you can renew your license by completing the Renewal Application for Sales Tax License (Form DR 0594). Please find the form attached here.
Fill out Form DR 0594 and submit it either by mail or in person at any Taxpayer Service Center.
Make sure to include a check or money order with your application. The renewal fee remains $16 for each business location.
If your LLC operates more than one sales location, each one should maintain its own separate license and renewal.
How Much Is A Sales Tax License In Colorado?

LLCs that operate as both retailers and wholesalers must pay a $16 license fee for each business location. The fee is adjusted according to the issuance date.
At the time of application, your LLC also pays a $50 deposit. For the first location, the total initial Sales Tax License cost is $66. If you open additional locations, you’ll need to pay another $16 license fee for each new site. That said, you don’t pay an extra $50 deposit for those additional locations.
- When a license is issued after June 30, Colorado prorates the fee in six-month increments. You can use the table above to check the exact prorated amount.
- Each sales tax license stays valid for about two years. It covers the year of issuance and the entire following year, through December 31.
- You are required to complete the State of Colorado Sales Tax License renewal before January 1 of the new renewal cycle. At renewal, you pay a $16 fee for every business location that is still operating.
- If you have no sales activity for 12 straight months, the state will automatically not renew your license.
The Department refunds the $50 deposit after a few essential milestones. These include your LLC starting business operations, filing all required sales tax returns, and paying the tax owed. You will also need to remit more than $50 in state sales tax overall to get the $50 deposit back.
Why Are LLCs Required To Get Sales Tax Licenses?
Under C.R.S. 39-26-103, anyone operating a retail business in Colorado must secure a Sales Tax License. You should get one from the Colorado Department of Revenue before conducting any sales. State law strictly prohibits retail activity without this license.

1. Civil Penalty
Any sales tax collected by a retailer is legally considered public money owed to the State of Colorado or the relevant local authority. Retailers need to hold these funds in trust and transfer them to the Department of Revenue. Failure to remit collected taxes constitutes a serious violation and can lead to penalties.

According to C.R.S. 39-26-103(4), retailers conducting sales without a valid license may incur a civil penalty of $50 per day. This amount is capped at $1,000 total.
The statute also authorizes the Colorado Department of Revenue to take away a Sales Tax License if the business doesn’t meet state obligations. However, the department should first issue a notice and hold a formal hearing. This allows the retailer an opportunity to resolve the violation before revocation occurs.
2. Interest And Extra Tax Penalties
Retailers remain responsible for all sales tax owed, even if they failed to collect it at the time of sale. This obligation applies whether or not a license was ever obtained, unless the transaction qualifies for a lawful exemption. For this reason, obtaining adequate licensing and collecting taxes accurately is essential.

If a retailer fails to file sales tax returns or doesn’t pay the tax due, the Department of Revenue can impose further penalties. These include a 10% charge on unpaid tax plus an additional 0.5% per month, up to a maximum of 18%. Additionally, interest will continue to accumulate on any outstanding balance until full payment is made.

Essential Contact Details: The Colorado Department Of Revenue
You can reach the Colorado Department of Revenue by calling the taxpayer helpline at (303) 238-7378.
Taxpayer Service Representatives are available Monday through Friday, from 8:00 A.M. to 4:30 P.M. (Mountain Time).
Frequently Asked Questions
The processing time depends on your selected submission method. Online applications may receive approval on the same day. On the other hand, mail filings can take up to six weeks to process.
Yes, Sales Tax Licenses expire on December 31 of odd-numbered years, such as 2023, 2025, and 2027. The only exception to them not expiring is if the DOR revokes them earlier.
Yes, you need a Colorado Sales Tax License if your business sells taxable goods or services in the state, including LLCs and other business structures.
2026 Colorado LLC Guides
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+ 12 sources
Bizreport adheres to strict editorial integrity standards avoids using tertiary references. We have strict sourcing guidelines and rely on peer-reviewed studies, academic research. To ensure the accuracy of articles in Bizreport, you can read more about the editorial process here.
- Colorado Department of Revenue (n.d.) Colorado Department of Revenue. Available at: https://tax.colorado.gov/.
- Colorado General Assembly (n.d.) Colorado Revised Statutes § 39-26-103 (Licenses – fee – revocation – definition). Available at: https://advance.lexis.com/documentpage/?pdmfid=1000516&nodeid=ABPAACAAFAABAACAAF.
- Colorado Department of Revenue (n.d.) Sales Tax / Wage Withholding Account Application (Form DR 1002). Available at: https://tax.colorado.gov/DR1002.
- Colorado Office of Economic Development and International Trade (n.d.) MyBizColorado. Available at: http://mybiz.colorado.gov/.
- Colorado Department of Revenue (n.d.) Visit a Service Center. Available at: https://tax.colorado.gov/visit-a-service-center.
- Internal Revenue Service (n.d.) 1099-MISC: Independent contractors and self-employed. Available at: https://www.irs.gov/faqs/interest-dividends-other-types-of-income/1099-misc-independent-contractors-and-self-employed/1099-misc-independent-contractors-and-self-employed-5.
- Internal Revenue Service (n.d.) Get an Employer Identification Number (EIN). Available at: https://www.irs.gov/businesses/small-businesses-self-employed/get-an-employer-identification-number.
- NAICS Association (n.d.) NAICS Code Search. Available at: http://www.naics.com/search.
- Colorado Department of Revenue (n.d.) Standard Retail License. Available at: https://tax.colorado.gov/standard-retail-license.
- Colorado Department of Revenue (n.d.) Revenue Online. Available at: https://www.colorado.gov/revenueonline/_/.
- Colorado Department of Revenue (n.d.) Electronic Funds Transfer (EFT). Available at: https://tax.colorado.gov/electronic-funds-transfer.
- Colorado Department of Revenue (n.d.) Add locations or sites to your sales tax account. Available at: https://tax.colorado.gov/add-locations-sites-to-your-sales-tax-account.

