DOR Taxation web site

Who to Contact For Help

Email and Frequently Asked Questions

The Online Customer Support Site has answers to commonly-asked Colorado tax questions. The most-asked questions and answers are displayed on the opening page. Use the "Search" box to type in the words that describe what you want to know. Answers related to your search will be displayed on the screen.

If you still have a question after you click on the answers or you have a question about a tax account, click on the "Send Us An E-mail" tab. The email option is available only after you view an online answer.