Colorado department of revenue phone number. Give the Relay Colorado agent the number that you would like to call. . us (opens in new window) Special Event Sales Tax: DOR_SpecialEvents@state. Box 17087 Denver, CO 80217-0087 Contact the Collections Section Contact the Excise Tax Unit Contact the Fee Unit Contact the Fuel Tax Unit Contact Us Contact Us By Email Contact Us By Mail Contact Us By Phone Corporate Income Tax Guidance Publications Corporate Income Tax Guide Corporate Income Tax Letter Rulings CR 0100 - Colorado Sales Tax and Withholding Account Application Sales & Use Tax System (SUTS) Support: Please dial the SUTS call line at 720-795-7759 or email DOR_SUTS_Help@state. Appointments: Appointments are needed for the Denver Regional Service Center. Box 17087 Denver Colorado Springs, Fort Collins, Grand Junction, and Pueblo Service Centers are closed for lunch daily, from 12:00 p. to 4:30 p. Contact Us Wondering About Your Refund? Visit the Where's My Refund webpage to find out how you can check your refund status, no phone call needed! Additional Contact Options Give the Relay Colorado agent the number that you would like to call. Monday through Friday (except on state holidays) Mailing Address: Colorado Department of Revenue Excise Tax Unit, Room 237 P. Please add our Taxpayer Services number (303) 238-7378 as a recognized contact in your phone or other electronic device to prevent spam filtering of your scheduled call. co. Please visit the Direct Deposit (opens in new window) webpage for more information. The Relay Colorado agent will stay on the line to relay the information/conversation to you. Walk-ins are welcome for all other locations, but appointments are highly encouraged. O. Give the Relay Colorado agent the number that you would like to call. us Phone: (303) 205-8287 Web Message: Send us a secure message through your Revenue Online account. Sales & Use Tax System (SUTS) Support: Please dial the SUTS call line at 720-795-7759 or email DOR_SUTS_Help@state. to 1:00 p. m. Hours of Operation: 8:00 a. us (opens in new window) Contact the Excise Tax Unit Email: DOR_ExciseTax@state. Box 17087 Denver, CO 80217-0087 Contact the Collections Section Contact the Excise Tax Unit Contact the Fee Unit Contact the Fuel Tax Unit Contact Us Contact Us By Email Contact Us By Mail Contact Us By Phone Corporate Income Tax Guidance Publications Corporate Income Tax Guide Corporate Income Tax Letter Rulings CR 0100 - Colorado Sales Tax and Withholding Account Application A letter will come with the refund that was converted to a paper check. us (opens in new window) A letter will come with the refund that was converted to a paper check. Friday: 9:00 a. Contact the Excise Tax Unit Email: DOR_ExciseTax@state. The letter contains a phone number taxpayers can call. Revenue Online File state taxes and manage your state tax account Visit Revenue Online Revenue Online Help Contact the Collections Section Phone: (303) 205-8291 Hours of Operation: Monday-Thursday: 8:00 a. Mailing Address: Colorado Department of Revenue Attn: Collections P. tmoc skvkqow dxwc kkavm lpgr muuava qcriz ssdam urmcfh hayb