1040 Colorado electronic filing information

State contact information

If you have specific questions about what you can e-file or about rejections you received, contact the state for more information.
Colorado Department of Revenue
Federal/State Electronic Filing Program 1375 Sherman Street, Rm. 206 Denver, CO 80261
www.colorado.gov/revenue
Email
: DOR_TaxpayerService@state.co.us
Phone
: 303.866.3889
Tax Refund Inquiries
: 303.238.7378

State electronic filing details

Grace period
5 days
E-filing mandate
No
Accepts state-only filings
Yes
Return types accepted
Resident
Part-year resident
Nonresident
Estimate payments
Extension
Amended
Return types not accepted
Superseded
Accepts returns with these conditions
Refund
Zero balance
Balance due
Direct deposit of refunds
Yes
Accepted forms of payment
Direct debit (EFW)
Credit card
Online ePayment
Signature requirements
ERO retains DR-8454 for 4 years
Supports PDF attachments
Yes
Tax year(s) supported for e-filing
Current tax year and two prior tax years
Special considerations
See Electronic filers handbook

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