Coronavirus Disease 2019 (COVID-19) in Colorado: State & National Resources

File Sales Tax Online

If you cannot file through Revenue Online or another electronic method, please download the form you need. Beginning with sales on January 1, 2018, the Colorado Department of Revenue (CDOR) will be requiring ALL Colorado sales tax licensees to report and pay sales tax to the penny, regardless of filing format.

Sales Tax Services in Revenue Online

  • File/amend sales tax returns (Instructions below)
  • File XML or Excel spreadsheet electronic returns for a business with multiple locations
  • File special event sales tax returns (Instructions below) (No Login Required)
  • View payment history
  • View account balances
  • View letters from the Department
  • Update your account mailing address
  • Close a business tax account
  • Set up Third Party access to your tax account (Instructions)


  • Verify a Colorado sales tax license (Instructions below) (No Login Required)
  • Check county and city sales tax rates (Instructions below) (No Login Required)
  • Verify the sales tax rates at a specific location(s) (No Login Required)
  • Obtain a rate chart for a specific tax percentage (No Login Required)
  • Find tax rates by address (No Login Required)
  • Make a payment (No Login Required)
  • File a protest
  • Add Power of Attorney (No Login Required)


How-To Videos

Tips for Setting up a Sales Tax Account in Revenue Online
How to File a Sales Tax Return in Revenue Online
How to File a Special Event Sales Tax Return in Revenue Online
How to Register in Revenue Online for Out-of-State Retailers
How to Add Non-Physical Sites in Revenue Online
How to Verify a Sales Tax License Using Revenue Online
Resetting your Revenue Online PasswordRequesting a Letter ID for Businesses
Authenticating a Browser or Device
Solving Login Issues