DOR Taxation web site


Say goodbye to the paper hassle. Revenue Online makes filing your return a simple and easy process.  Revenue Online is FREE and available 24-hours a day, every day.

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

  • More than 80 percent of Coloradans eFile. It's free and easy to do. Try it today!

  • 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.



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.

  • 104, 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.