DOR Taxation web site

Say goodbye to the paper hassle. Revenue Online makes filing your return a simple and easy process. 

  • Electronic filing of your tax refund may speed up your refund.

  • Convenient, accurate, secure and fast. Avoid errors and processing delays.

  • Make payments by e-check, credit card or EFT through Revenue Online.

Create your own Login ID and Password. Then use them to get to your account and File Now. www.Colorado.gov/RevenueOnline


RevenueOnline 
 

Still want to download a form? These forms won't calculate the tax for you but if you want to use a paper form, click the link below.

  • 106, Income Tax Booklet  Note: Fill-in forms are not saveable and will not file the return for you. You must print the return and mail it. However, you can file the return now through Revenue Online.