Colorado Department Of Revenue Fax Number, SUTS is the Sales & Use Tax System from the Colorado Department of Revenue. Box Taxpayer Identity Verification Taxpayer Security is Our Priority The Colorado Department of Revenue (CDOR) routinely takes precautionary measures to ensure taxpayer refunds are not diverted to identity thieves. The State of Colorado, Department of Revenue/Division of Motor Vehicles (DMV) administers the Motorist Insurance Identification Database (MIIDB) program. , Suite 101 Denver, CO 80204 1 When shipping to this address, include the section name or room number if known. O. to 4:30 p. Filing Deadline and Extensions Colorado individual income tax returns are due April 15, matching the federal deadline. The Department reviews all income tax refunds because it is operating in the public trust with revenue dollars collected and refunded. Colorado Springs, Fort Collins, Grand Junction, and Pueblo Service Centers are closed for lunch daily, from 12:00 p. Mark Buckingham is the primary contact at State of Colorado Department of Revenue. dx, uanzzah8y, v4kqra, mqw, bua1, uihbgn, 2b2z, vbo, e2, oxci,