Mail a Form

Mailing Address 
This address and zip code are exclusive to the Colorado Department of Revenue and a street address is not required. 
Colorado Department of Revenue
Denver, CO 80261-
Use the following "Plus-4" numbers to get returns and payments routed to the correct tax office within the department:

Income Tax
Form Address

104, 104CR, 104PN, 104X
105
106, 106CR, 107
112, 112C, 112CR, 112SF, 112X
DR 0617
DR 1778 

If you are submitting the form with a check or payment:
Colorado Department of Revenue
Denver, CO 80261-0006
 
If you are submitting the form without a check or payment:
Colorado Department of Revenue
Denver, CO 80261-0005

DR 104BEP
DR 108
DR 0158-C, DR 0158-F, DR 0158-I, DR 0158-N
DR 0900, DR0900C, DR0900P

Colorado Department of Revenue
Denver, CO 80261-0008
All other income tax related forms
Colorado Department of Revenue
Denver, CO 80261-0008
Notice of deficiency, tax protests, delinquent tax payments
Colorado Department of Revenue
Denver, CO 80261-0004

 

All Other Taxes including Sales and Withholding

  • 80261-0004: notice of deficiency, tax protests, delinquent tax payments
  • 80261-0009: withholding tax, annual withholding reconciliations and miscellaneous business and excise taxes (e.g., liquor, cigarette, tobacco, fuel, heavy truck sales, aviation, prepaid wireless E911 surcharge)
  • 80261-0013: sales tax, use tax, county lodging, county short term rental, local marketing district tax, rural transportation authority