Manage My Tax Account

Income Tax Account: 

A Colorado income tax account is created for the taxpayer the first time an income tax return is filed with the Department of Revenue. The Department establishes an eight-digit Colorado Account Number (CAN) which should be used on all future income tax filings. If a corporation also have an eight-digit CAN for a sales tax license/account or a wage withholding account, that is the same number that should be used on the income tax return.
Access your tax account information through Revenue Online. Taxpayers may access their account through the Department’s free service, Revenue Online. (Learn How to Sign Up for Access.)

For other tax types, choose an option below:

Sales Tax Marijuana Taxes
Use Tax Cigarette Tax
Withholding/Payroll Tax Tobacco Tax
Severance Tax International Fuel Tax Agreement (IFTA)
Liquor Taxes Other Fuel Taxes