2023 Oklahoma State Tax Deadlines

Oklahoma Individual Income Tax Filing deadlines and extensions for 2023.

If you are a resident or have been involved in significant business operations within Oklahoma then you might be required to file Oklahoma State Taxes. We look at the most important tax deadlines and tax extensions for Oklahoma in 2023.

C Corporation

Oklahoma C Corporation Tax Deadlines for 2023

You must file & pay Corporate Income Taxes in Oklahoma by May 15, 2024.

Applicable form: 
Form 512 - Corporation Income and Franchise Tax Return

Extension to File Taxes in Oklahoma for 2023

You must send payment for taxes in Oklahoma for the fiscal year 2023 by May 15, 2024.

The Extension Deadline is December 15, 2024 to file your Oklahoma income tax return.

Oklahoma automatically grants 7 months extensions on filing corporate income tax returns, if a federal extension is filed.. This means you do not need to file for an extension in Oklahoma. If your federal return is not extended, or an Oklahoma liability is owed, an extension of time to file your Oklahoma return may be granted on Form 504-C. The Form 504-C must be filed on or before the due date of the return.

This is an extension to FILE, not an extension to PAY - payment is still due May 15, 2024.

Form 504-C

Pass-Throughs

Oklahoma S Corporation & Partnership Tax Deadlines for 2023

You must file in Oklahoma by April 16, 2024.

Applicable forms:
Form 512-S - Oklahoma Small Business Corporation Income and Franchise Tax Return
Form 514 - Oklahoma Partnership Income Tax Return

Extension to File S Corporation & Partnership Taxes in Oklahoma for 2023

You must send payment for taxes in Oklahoma for the fiscal year 2023 by April 16, 2024.

The Extension Deadline is October 15, 2024 to file your Oklahoma income tax return.

Oklahoma automatically grants 6 months extensions on filing pass-through entity income tax returns, if the federal extension is filed This means you do not need to file for an extension in Oklahoma. If your federal return is not extended, or an Oklahoma liability is owed, an extension of time to file your Oklahoma return may be granted on Form 504-C.

This is an extension to FILE, not an extension to PAY - payment is still due April 16, 2024.

Oklahoma Individual Tax Deadlines for 2023

Estimated Tax Deadline for Oklahoma 2023

Estimated tax payments should be made:  

  • April 18, 2023
  • June 15, 2023
  • November 15, 2023
  • January 15, 2024

See OW-8-ES for the amount to pay with each voucher.

Individual Tax Deadline for Oklahoma 2023

You must file & pay Individual Income Taxes in Oklahoma by April 15, 2024.

Applicable forms:
Form 511 - Full Time Residents
Form 511NR - Non-Residents & Part-Year Residents

Extension to File Taxes in Oklahoma for 2023

You must send payment for taxes in Oklahoma for the fiscal year 2023 by April 15, 2024.

The Extension Deadline is October 16, 2024 to file your Oklahoma Individual Income tax return.

Oklahoma will automatically grant a 6 months extension on filing personal income taxes if a federal extension is filed. This means you do not need to file for an extension in Oklahoma if you file a federal extension. If you do NOT file a federal extension, file Form 504-I.

This is an extension to FILE, not an extension to PAY - payment is still due April 15, 2024.

Estates Tax Deadline for Oklahoma 2023

Oklahoma does not have an Estate Tax.

Farmer and Fisherman Taxes for Oklahoma 2023

If at least 2/3 of your gross income for the taxable year is derived from farming, you may pay estimated tax at any time on or before January 15, 2024. If you wait until January 15, 2024, you must pay the entire balance of the estimated tax. However, if farmers file their tax return on or before March 1, 2024, and pay the total tax at that time, they need not file estimated tax.

Sources

The material discussed on this page is meant for general illustration and/or informational purposes only and is not to be construed as investment, tax, or legal advice. You must exercise your own independent professional judgment, recognizing that advice should not be based on unreasonable factual or legal assumptions or unreasonably rely upon representations of the client or others. Further, any advice you provide in connection with tax return preparation must comply in full with the requirements of IRS Circular 230.

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