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
• File XML or Excel spreadsheet electronic returns for a business with multiple locations
• View payment history
• View account balances
• View letters from the Department
• Update your account mailing address
• Close a business tax account
• File a protest
• Set up a Third Party access to your tax account

• Verify a Colorado sales tax license (instructions below)
• Check county and city sales tax rates (instructions below)
• Verify the sales tax rates at a specific location(s)
• Obtain a rate chart for a specific tax percentage
• Find tax rates by address
• Make a payment
• File special event sales tax returns (instructions below)
• Add Power of Attorney

How-To Videos

How to File the Colorado Retail Sales Tax Return (DR 0100) using Revenue Online for filing periods beginning on January 1, 2020 and after. To watch the YouTube Video on Filing DR 0100, click here.