Contact Us

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.

 

Other Contact Options 

Visit for information on Taxpayer Service Centers          Visit for more information on how to contact us by mail          Visit for more information on how to contact us by email

Visit for More Contact Phone Numbers           Link to Speaking Request Form

 


Hearing or Speech Impaired Relay Services

Text Telephone (TTY) Icon To use this service, dial the appropriate number below. 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