Oklahoma W2 E-File Requirements & EFW2 Text Format | OK TAP Upload

Oklahoma W2 Electronic Filing Common Questions and Answers

Does Oklahoma mandate filing W-2s electronically?

As an Oklahoma employer you are required to file electronically.

What is the name of the publication that defines Oklahoma W2 E-Filing format and details?

Refer to FAQ's W-2/W-3 Filing and Information which includes RS and RV record formatting requirements.

What software can I use to generate Oklahoma W2 E-File submissions?

You can use our W2 Mate software to create W2 E-File submissions that comply with Oklahoma requirements. To learn more about W2 Mate and download a demo you can visit


Can I mail my W2 E-File submission on a CD or other formats of magnetic media to Oklahoma?

Oklahoma no longer accepts magnetic media submissions.

Does Oklahoma follow the EFW2 format defined by the SSA?

Yes, Oklahoma follows the "Specifications for Filing Forms W-2 (EFW2)" as defined by the SSA, but the state also has its own special requirements.

How can I submit the Oklahoma Tax Commission-EFW2 (W2 E-File) Withholding file attachment to Oklahoma?

You will upload a file through OkTap https://oktap.tax.ok.gov/oktap/Web/ You will need to have an OTC account in order to register for an OkTAP account.

Do you need to include the RV (State Total) record as part of the Oklahoma W2 E-File Submission?

Yes, this record is mandatory and has to be included.

Do you need to include the RS (State Wage) records as part of the Oklahoma W2 E-File Submission?

Yes, this record is mandatory and has to be included.

Does Oklahoma have a special file naming convention for W2 E-File submissions?

The state requires W2_001_999999999_2017.txt (001 = file sequence number, 2017 = Tax Year, 999999999 = YOUR FEIN).

Is the Oklahoma W2 Electronic Filing submission attachment an ASCII text file?

Yes, the submission is a text file that follows the specifications of both the SSA EFW2 format and the Oklahoma requirements.

Does Oklahoma have any requirements for money fields?

Money fields must contain only numbers. Right-justify and zero fill to the left.

Does Oklahoma have any requirements for Social Security Number (SSN)?

Use the number shown on the original/replacement SSN card. If there is no SSN available for the employee, enter zeros (0) in positions 10 - 18 of the RS Record.

How do I know if my submission was successful?

After a successful submission to OkTap, you will be directed to a confirmation screen. It's very important that you print this page for your records.

How do I contact Oklahoma with questions about my W2 E-File submission?

Call 405-521-3160

The electronic filing engine available inside our W2 Mate® software gives Oklahoma employers and tax professionals the ability to e-File W2s with both the state of Oklahoma and the Social Security Administration’s (SSA). To learn more about W2 Mate visit https://www.realtaxtools.com/W2-Mate.html , email sales@realtaxtools.com or call 1-800-507-1992. 

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