Table of Contents

W-2 E-Filing: Colorado

Nina Tchistiakova Updated by Nina Tchistiakova

Due date

January 31

E-filing threshold

Must E-file if 10 or more

Filing options

Electronic filing

Transmittal form

Submittal of any informational returns via paper require the respective annual reconciliation form be submitted with the paper informational returns. Additionally, an annual reconciliation form is required if a balance is due at the time of filing the 1099 or W-2 informational returns and should include a reconciliation payment for the underpaid balance. An annual reconciliation form should be filed if a refund is being claimed for an overpayment of withholding for any of the withholding types to claim the refund as this will not be automatically calculated and issued based on the uploading of the electronic filing of 1099, W-2 or W-2G returns. 

Required file name

Any name with “.txt” at the end.

E-filing website

https://www.colorado.gov/revenueonline/_/

Contact

Marc Maes 303-205-5252, marc.maes@state.co.us

 Irene Montgomery 303-205-5290, irene.montgomery@state.co.us

Submitting files

Colorado accepts electronic filing for Prior Years.
Colorado Corrections must be paper filed. See below.

Register the submitter at least five days prior to submitting the file: Revenue Online.

When you have completed the registration process, you do not need to do it again. Each year when you submit your W-2s, 1099s, or W-2Gs in Revenue Online, you will start at Step 2.

Anyone who will submit W-2s, 1099s, or W-2Gs– whether a tax professional, tax service provider and/or a person who does the payroll at the business – must register.

An employer that files electronically should not submit a paper Form DR 1093, except to remit any additional tax due or claim a refund for an overpayment.

FAMLI should be reported in Box 14 Other.

1) Go to Colorado.gov/RevenueOnline.

B) Click on the hyperlink to “Submit Year-End Withholding” under the heading “Additional Services.”

C) Click on the link Request Withholding Submitter Access.

D) Complete the requested fields.

A Confirmation will appear to confirm that the department has received the registration request. In most cases, the registration process is completed overnight; however, it may take up to five business days to complete.

➢ Revenue Online will validate the full file and list all errors contained rather than rejecting after the first error is found.

➢ After a successful submission, Revenue Online will automatically populate the webpage with a confirmation. Print this page for your records.

Colorado does allow testing files on Revenue Online. The testing link will be available beginning October 1 through March 31 of the following year. You must have submitter access to be able to test a file through our system. You can request submitter access anytime prior to testing or submitting a year-end file. Please note, submitter access may take up to 5 business days to be granted. It is advised to do this well in advance of the January filing deadline. The testing link will be found under the Withholding Box on Revenue Online https://www.colorado.gov/revenueonline/_/

Corrections

Corrected W-2s should be mailed to the Department, along with a cover letter, to:

Colorado Department of Revenue

Discovery Section

PO Box 17087

Denver, CO 80217-0087

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