View Frequently Asked Tax Questions
Send Us A Secure Email Regarding Your Tax Matters
- Search for your answer in our database.
- Click on the Answer that best fits your needs.
- Click "Send Us an Email" if you still have questions.
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Call Us With Your Tax Matters:
(303) 238-SERV (7378)
Customer Service Representatives are available Monday through Friday, 8 a.m. to 4:30 p.m.
Refund Information
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.
Other Helpful Numbers
- EFT/Electronic Payment Help: (303) 205-8333
- Fuel Tax/IFTA Helpline: (303) 205-8205
- Tax Auditing and Compliance: (303) 866-3711
- Office Collections: (303) 205-8291
- Fair Share/Discovery: (303) 205-8292
- Report Tax Evasion or Fraud: (303) 205-8262
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