An Overview of Oklahoma Personal Income
Tax Extension

- Updated March 17, 2021 - 8.00 AM by Admin, ExpressExtension

Does Oklahoma support tax extension for personal income tax returns?

Q

Yes. The state of Oklahoma requires individuals to file a Federal Form 4868 rather than requesting a separate state tax extension.

In case the federal tax extension Form 4868 was rejected, then the individuals can file State Tax extension Form Form 504-I.

What Form does the state of Oklahoma require to apply for an extension?

Q

Individuals in Oklahoma need to file Form 504-I with the state to get a 6-month extension of time to file their personal income tax returns 511 with the state.

  • Form 504-I - Request For Extension Of Time For Filing Individual Tax Returns

Note: Make sure to pay any taxes due along with the extension Form to avoid penalties and interest.

When is the deadline to file Form 504-I with the state of Oklahoma?

Q

Oklahoma State individual tax extension Form 504-I must be filed on or before the 15th day of the 6th month after the tax year ends (June 15,2021 for calendar year filers).

How do I pay my balance due along with the extension Form?

Q

If you owe Oklahoma state taxes, you must pay your tax due by the regular due date, or you will be charged with penalties and interest.

Make a tax payment with your extension using Form 511 (Estimated Tax Declaration Voucher) and attach it with Form 504-I.

To pay electronically, visit State payment options.

You can also pay the tax due online using www.tax.ok.gov or mailing your Form.

Mailing Address for filing Extension with the State?

Q

Where do I mail the extension Form 504-I?

Oklahoma Tax Commission
Income Tax
P.O. Box 26890,
Oklahoma City,
Oklahoma 73126-0890

Where do I mail the Form 511?

Oklahoma Tax Commission
Income Tax
P.O. Box 269045,
Oklahoma City,
Oklahoma 73126-9045.