Colorado Sales Tax Return Instructions
This document provides comprehensive instructions for filing the Colorado Sales Tax Return. It includes details on electronic filing options, important dates, and common filing errors. A must-read for retailers in Colorado to ensure compliance with state tax regulations.
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How do I fill this out?
To fill out this form, first ensure you have all necessary identification and tax information at hand. Complete the required fields with accurate sales data for each physical and non-physical location. Follow the detailed instructions provided in the Colorado Sales Tax Guide to ensure correct submission.

How to fill out the Colorado Sales Tax Return Instructions?
1
Gather your sales data and required identification.
2
Fill in your Colorado account number and filing period.
3
Enter gross sales and local jurisdiction codes accurately.
4
Review for any deductions or exemptions that apply.
5
Submit your completed return by the specified due date.
Who needs the Colorado Sales Tax Return Instructions?
1
Retailers operating in Colorado must file this return to report sales tax.
2
Online merchants who sell products to Colorado residents need to comply.
3
Wholesalers and distributors who make taxable sales in Colorado must submit this form.
4
Service providers delivering taxable services within the state are required to file.
5
Businesses with multiple locations must file separate returns for each site.
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What are the instructions for submitting this form?
Retailers can submit the Colorado Sales Tax Return via electronic filing through Revenue Online or by mailing a completed paper form. For electronic submissions, ensure you have a Revenue Online account. Paper returns should be sent to the Colorado Department of Revenue at Denver, CO 80261-0013.
What are the important dates for this form in 2024 and 2025?
The due dates are the 20th of the month following each reporting period. For quarterly returns, the due dates vary by quarter. Annual returns are due by January 20th of the following year.

What is the purpose of this form?
The purpose of the Colorado Sales Tax Return is to ensure that retailers comply with state sales tax laws. It allows businesses to report sales taxes collected from customers. Proper filing helps maintain good standing with the Colorado Department of Revenue.

Tell me about this form and its components and fields line-by-line.

- 1. Gross Sales: Total sales made during the filing period.
- 2. Tax Due: Calculated tax based on reported sales.
- 3. Filing Period: Indicates the time frame for which the return is being filed.
- 4. Account Number: Unique identifier for the retailer.
- 5. Location Jurisdiction Code: Code identifying the sales location.
What happens if I fail to submit this form?
Failure to submit the Colorado Sales Tax Return may lead to estimated tax assessments from the Department. It could result in penalties, interest on unpaid tax, and deactivation of the sales tax account.
- Estimated Taxes: The department may issue a notice estimating the taxes due.
- Account Deactivation: Failure to file may lead to deactivation of your sales tax account.
- Penalties: Late submissions can incur penalties and interest.
How do I know when to use this form?

- 1. Retail Sales: File when selling retail goods directly to consumers.
- 2. Service Provision: Used when providing taxable services to customers.
- 3. Online Sales: Required for sales made online to Colorado residents.
Frequently Asked Questions
What is the purpose of the Colorado Sales Tax Return?
This form is used to report sales taxes collected by retailers in Colorado.
How can I edit the PDF of this form?
You can upload the form to PrintFriendly and use the editing tools provided.
What happens if I miss the submission deadline?
You may incur penalties and interest on any unpaid tax amounts.
Can I share the PDF after editing?
Yes, you can easily share your edited PDF via email or social media.
Is electronic filing available?
Yes, you can file electronically through Revenue Online.
How do I obtain my Colorado account number?
Contact the Customer Contact Center for assistance.
Is there a fee for electronic payments?
There is no processing fee for EFT payments.
What should I do if I need to amend my return?
File a separate amended return for each filing period.
Can I file a paper return?
Yes, you can file a paper return if electronic filing is not preferred.
What resources are available for additional help?
Visit Tax.Colorado.gov for guidance and instructional resources.
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