First, complete the federal income tax return you will file with the Internal Revenue Service (IRS). You will use numbers from your federal return on your Colorado income tax return.
- Revenue Online: You may use the Colorado Department of Revenue's free e-file and account service Revenue Online to file your state income tax. You do not need to login to Revenue Online to File a Return. After you file, you have the option of setting up a Login ID and Password to view your income tax account in Revenue Online.
- You may opt to e-file through a paid tax professional or purchase tax software to complete and file returns.
Individual Income Tax Services in Revenue Online
No Login Required