Return the DR 0900F with check or money order payable to the “Colorado Department of Revenue”. Mail payments to:
Colorado Department of Revenue, Denver, Colorado 80261‑0008.
These addresses and ZIP codes are exclusive to the Colorado Department of Revenue, so a street address is not required. Write your Colorado Account Number or FEIN and “2024 DR 0105” on your check or money order. Do not send cash. Enclose, but do not staple or attach, your payment with this form.