File Sales Tax Online
- Revenue Online. After you create your own User ID and Password for the income tax account, you may file a return through Revenue Online. If you have more than one business location, you must file a separate return in Revenue Online for each location. For additional e-file options for businesses with more than one location, see Using an Approved Sales Tax Software or Multiple Location Filers below.
- Using an Approved Sales Tax Software Vendor.
- Multiple Location Filers that do not use approved software: See the Sales Tax Spreadsheet Filing page.
- Software Developers -- Sales Tax XML
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