File Individual Income Tax Online

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. 

Tax Professionals:

Individual Income Tax Services in Revenue Online

  • Amend individual income tax returns
  • View 1099-Gs (issued by the Colorado Department of Revenue)
  • View payment history
  • View account balances
  • View letters from the Department
  • Update your account mailing address
  • Set up Third Party access to your tax account (Instructions)
  • Make a payment (Instructions) (No Login Required)
  • File individual income tax returns (Please note that filing your return in Revenue Online does not automatically set up an account for you) (No Login Required)
  • Check your refund status (No Login Required)
  • Submit e-Filer Attachments for income tax returns (Instructions) (No Login Required)
  • File a protest (No Login Required)
  • Add Power of Attorney (No Login Required)

How-To Videos

Tips for Setting up your Revenue Online Account
How to Make an Individual Income Tax Payment Using Revenue Online
Requesting a Letter ID for Individuals
Resetting your Revenue Online Password
Authenticating a Browser or Device
Solving Login Issues