So I am already done with my federal tax all I have to do is mail in my Colorado state

[JohnW15]

If you're asking for the address to send your Colorado state income tax return, the address

• If you're not sending a payment with your return is COLORADO DEPARTMENT OF REVENUE, Denver, CO 80261-0005
• If you're sending a payment with your return is COLORADO DEPARTMENT OF REVENUE, Denver, CO 80261-0006