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
No Login Required
- 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
Login Required
- Make a payment
- File individual income tax returns - Please note that filing your return in Revenue Online does not automatically set up an account for you
- Check your refund status
- Submit e-Filer Attachments for income tax returns
- File a protest
- Add Power of Attorney