Attention, all Taxation Division offices will close at 3 p.m. Thursday, May 9. Offices will reopen at their normal times on Friday, May 10.

 
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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