| Business Entity Type | LLCs / Partnerships |
| Filing Status | Approved with Federal |
| Extension Information | * Oklahoma grants an automatic extension if a valid federal extension is obtained and at least 90% of the tax due is paid by the original return due date. * A copy of the federal extension must be enclosed with the final return when filed. * The extension is NOT an extension to pay any taxes you may have due. Tax payments are due by the original return due date. * 6-month automatic extension if federal extension is filed by the original due date of return and no tax is due. Additional 1-month extension may be granted if Form 504 is filed by the extended due date. |
| Online Payment | Oklahoma | Online Tax Extension Payment |
| State Payment Agency | Oklahoma Tax Commission |
| Late Filing Penalty | 25% of the amount of the assessment. |
| Late Payment Penalty | 10% is added to the amount of delinquent tax. |
| Tax Year | 2024 |
| Payment Voucher | Form 504-C | Application for Extension of Time to File an Oklahoma Income Tax Return for Corporations, Partnerships, and Fiduciaries |
| Mailing Address | Oklahoma Tax Commission |
| Original Due Date | 15-Apr-25 |
| Extended Due Date | 15-Oct-25 |
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