Please remember that you must claim the state sales tax refund (TABOR refund) when filing your state income tax return. If you claimed a 2023 refund, the TABOR refund will be combined and issued out with your refund. Unlike the 2022 Colorado cashback, no separate check will be issued. 


Contact the Collections Section

Phone: (303) 205-8291

Fax: (303) 866-2037

Hours of Operation:

  • Monday-Thursday: 8:00 a.m. to 4:30 p.m.
  • Friday: 9:00 a.m. to 4:30 p.m.

Mailing Address:

Colorado Department of Revenue
Attn: Collections
P.O. Box 17087
Denver, CO 80217-0087