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  2. Call the Taxpayer Helpline - (303) 238-7378. Taxpayer Service Representatives are available Monday through Friday, 8:00 a.m. to 4:30 p.m. MT (except on state holidays). Language translation service is available over the phone. Request this service once connected to a Taxpayer Service Representative.

  3. Contact Us By Phone - Department of Revenue - Taxation

    tax.colorado.gov/contact-us-by-phone

    Call the Taxpayer Helpline. (303) 238-7378. Taxpayer Service Representatives are available (except on state holidays) Monday through Friday, 8:00 a.m. to 4:30 p.m. MT. Language translation service is available over the phone. Request this service once connected to a Taxpayer Service Representative. All Service Centers and Call Center will be ...

  4. Online Services - Department of Revenue - Taxation

    tax.colorado.gov/training/online-services

    Revenue Online (ROL) File state taxes and manage your state tax account. (does not include self-administered home rule jurisdictions) Visit ROL. ROL Help.

  5. Contact Us By Email - Department of Revenue - Taxation

    tax.colorado.gov/contact-us-by-email

    Contact your email provider for more information regarding email security options for your email account. Another option is to send the Department a secure message through your Revenue Online account. Visit the How to Send a Secure Message web page to learn more.

  6. Revenue Online Help | Department of Revenue - Taxation. All State Offices will be closed on Monday, November 11, in observance of Veterans Day.

  7. Visit a Taxpayer Service Center - Department of Revenue -...

    tax.colorado.gov/visit-a-service-center

    Walk-in wait times vary based on service center visitor volume and open appointment availability. To make an appointment, please visit revenue online and scroll down to the bottom of the page in the Appointments section. Appointments may be scheduled for in-person service.

  8. Where's My Refund? - Department of Revenue - Taxation

    tax.colorado.gov/where-is-my-refund

    You can check the status of your refund on Revenue Online. There is no need to login. Simply choose the option "Where's My Refund for Individuals" in the box labeled "Refund Resources". Then, enter your SSN or ITIN and the refund amount you claimed on your current year's income tax return.

  9. Taxpayer Service Centers: Can assist with general information regarding taxes. Can provide tax account registration assistance. Can provide tax filing assistance. Perform enforcement and business seizure activities due to failure to file taxes, and monitor tax delinquencies. See list of Taxation Service Centers.

  10. The International Fuel Tax Agreement (IFTA) is an agreement between all 48 contiguous states and 10 Canadian provinces. Each state/province is called a “member jurisdiction.”. The state in which you obtain your IFTA credentials is called your “base jurisdiction.”. IFTA is not an additional tax.

  11. Send a Secure Message in Revenue Online - Taxation

    tax.colorado.gov/training/send-ROL-secure-message

    Secure messages are sent via Revenue Online and are answered in the order in which they are received. Please allow 4-6 weeks for a response to your secure message. If you need assistance more quickly, please call the Taxpayer Helpline at (303) 238-7378.