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

Email
: DOR_TaxpayerService@state.co.us

Phone
: 303-238-7378

E-filing information	Details
Grace period	5 days
E-filing mandate	Returns claiming enterprise zone credits must be filed electronically by statute.
Accepts state-only filings	Yes. Attach the federal XML created for this State (Default). Only Federal e-file validation errors have to be cleared. E-file Reject Diagnostics do not have to be cleared.
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Return types not accepted	Superseded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
Driver's license requirements	Optional. PIN not allowed as signature.
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