Note: please allow three (3) business days for an email response.
Email Tips
- Include your name, contact telephone number, address, and Colorado Account Number (CAN), if known.
- Explain your inquiry completely and provide all applicable details.
- Do not send multiple emails. Emails are answered in the order in which they are received.
- Do not include private personally identifiable information (e.g. your Social Security Number). Email communication with the Department is unencrypted by default. If you would like to send a secure message, you can do so using your Revenue Online account.
Phone
(303) 205-8287 Option 2
Note: If agents are not available, please send an email or secure web message.
Hours of Operation
8:00 a.m. to 4:30 p.m. Mountain Time, Monday through Friday (except on state holidays)
Mailing Address
Fee Return Payments
Colorado Department of Revenue
Denver, CO 80261-0009
Letters & Protests
U.S. Postal Service First Class Mail
Colorado Department of Revenue
Fee Unit
P.O. Box 17087
Denver, CO 80217-0087
Express Mail Delivery (DHL, FedEx, UPS, USPS Priority, etc.)
Colorado Department of Revenue
Fee Unit
1881 Pierce St.
Entrance B
Lakewood, CO 80214