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All State Offices will be closed on Monday, October 2, in observance of Frances Xavier Cabrini Day.

 
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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

    Dedicated Phone Support

    • EFT/Electronic Payment: 303-205-8333
    • Sales & Use Tax System (SUTS) Support: 720-795-7759

    Tax Unit Contact Phone Numbers

    • Bankruptcy: 303-866-3711
    • Collections: 303-205-8291
      • Collections Hours of Operation:
        • Monday-Thursday from 8:00 a.m. to 4:30 p.m.
        • Friday 9:00 a.m. to 4:30 p.m.
    • Compliance: 303-866-3711
    • Discovery: 303-205-8292
    • Excise Tax Unit (Cigarette, Liquor, Nicotine, Marijuana, and Tobacco Products): 303-205-8287
    • Field Audit: 303-692-7912
    • Fraud and Tax Evasion: 303-205-8262
    • Fuel Tax Unit (Fuel & IFTA): 303-205-8205
    • Special Event Sales Tax: 303-866-5643

    Schedule a Call From Taxpayer Services

    Taxpayer Helpline Call Scheduler:

    Please use the button below to schedule a time for Taxpayer Services to call you directly. You can expect a call within 10 minutes of your scheduled appointment time. 

    Include in the message:

    • Name
    • Phone Number
    • Colorado Account Number or Letter ID (if you have it)
    • Tax Type (Individual Income Tax, Sales Tax, Withhold Tax, etc.)

     

    Schedule a Phone Call

    Hearing or Speech Impaired Relay Services

     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

      Relay Colorado Information

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