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: 8:30 a.m. to 4:30 p.m.

Mailing Address:

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