Using Revenue Online?
- Revenue Online Sign Up/Login Help Videos
- Revenue Online “Where’s My Refund?”
- How to use Secure Messaging in Your Revenue Online Account
Call the Taxpayer Help Line
Tax Information: (303) 238-7378
- Taxpayer Service Representatives are available Monday through Friday, 8:00 a.m. to 4:30 p.m.
Other Contact Phone Numbers
- EFT/Electronic Payment Help: 303-205-8333
- Collections: 303-205-8291
- Discovery: 303-205-8292
- Field Audit: 303-355-0400
- Report Tax Evasion, Fraud or Scams: 303-205-8262
Hearing or Speech Impaired: Relay Colorado
To use this service, dial the appropriate number above. Give the Relay Colorado agent the number that you would like to call. The Relay Colorado agent will stay on the line to relay the information/conversation to you.
- TTY Telephone Users: 1-800-659-2656
- Voice Telephone Users: 1-800-659-3656
Assistance in Person (Service Centers)
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.