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Oklahoma Income Taxes and OK State Tax Forms

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Start Federal and Oklahoma State Tax Returns

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Prepare and efile Your Oklahoma Tax Return

The tax software makes it easy for you to efile your state tax return and use the correct state tax forms. Prepare and efile your Oklahoma state tax return (resident, nonresident, or part-year resident) and Federal tax return together or separately at View the federal tax return filing requirements.

Oklahoma Income Tax Filing Deadline

The regular deadline to file an Oklahoma state income tax return is April 15. However, if you efile your return through a tax preparer or an online tax vendor, your due date will be extended to April 20. Any payment of taxes due on April 20 must be remitted electronically in order to be considered timely paid. If the balance due on an electronically filed return is not remitted electronically, penalty and interest will accrue from the original due date.

Tax Deadline Date Type of Income Tax Return Filing Deadline / Due Date Description
April 18, 2017 2016 Oklahoma State Tax Return Due date for Oklahoma State Income Tax Returns - income tax filing deadline
April 18, 2017 2016 Oklahoma State Tax Extension Due date for Oklahoma extensions
October 16, 2017 2016 Oklahoma State Tax Return Last day to efile a 2016 Oklahoma State Income Tax Return for tax extension filers and late efilers

View all state tax return filing deadlines.

Find federal income tax return filing deadlines.

Tax Year 2016 Oklahoma State Tax Forms

All of the following Oklahoma state tax forms are supported by the software:

Form/Schedule Description Can I efile this form?
Form 507 Statement of Person Claiming an Income Tax Refund Due a Deceased Taxpayer


Form 511 Individual Resident Income Tax Return
Form 511 Ins Instructions for Form 511
Form 511NR Individual Nonresident/Part-Year Income Tax Return
Form 511NR Ins Instructions for Form 511NR
Form 511CR Other Credits
Form 511TX Credit to Tax Paid to Another State
Form 538H Property Tax Credit
Form 538S Claim for Credit/Refund of Sales Tax
Form 561 Oklahoma Capital Gain Deduction
Form OW-8-ES Oklahoma Individual Estimated Tax
Form OW-8-P Underpayment of Estimated Taxes

Oklahoma State Tax Forms that Cannot Be efiled

Oklahoma State Tax Withholding Form

Form Description
None Oklahoma doesn't have a state tax withholding form. The withholding allowances are the same number as those on Federal Form W-4.

Oklahoma State Tax Payment Forms

Form Description

Form 511-V

Individual Income Tax Payment Voucher

OK Tax Extension

Extension Form Oklahoma Extension Instructions How to File

Form 504

If you were granted a federal tax return extension and you do not owe Oklahoma state tax, the federal extension automatically extends your OK state tax return deadline. You must include a copy of the federal extension with your Oklahoma state return.

If you did not apply for a federal return extension or you owe Oklahoma state tax, you can apply for an OK state tax return extension by filing Form 504. Applications for OK state extensions must be postmarked on or before the original state tax return deadline, or before the expiration of the federal tax return extension deadline.

An extension of time to file is not an extension of time to pay any state taxes owed. An extension is valid only when 90% of the tax is paid by the original OK state tax return deadline. There will be a one-time 5% delinquent penalty and 1.25% per month interest fee on any tax not paid by the original tax return deadline.

Complete Form 504 if you owe tax or did not file federal extension

Important Reminder! If you are efiling an Oklahoma tax extension, you may need to efile a federal tax extension as well.

OK Tax Amendment

Amended Oklahoma state tax returns cannot be efiled; they can only be filed by mail. Learn how to prepare and file an Oklahoma tax amendment.

Important Reminder! If you are filing an Oklahoma tax amendment, you may need to file a federal tax amendment as well.

2015 Oklahoma Tax Forms

Oklahoma tax returns for 2015 cannot be prepared and filed online. Download the tax forms, complete them, print them out, and mail them to the Oklahoma Tax Commission.
Form/Schedule Description How to File
Form 511 Oklahoma Resident Income Tax Return

Download, fill out, print out, sign, and mail

Form 511NR Oklahoma Nonresident/Part-Year Income Tax Return
Schedule 511-B/511NR-A Oklahoma Additions
Schedule 511-A/511NR-B Oklahoma Subtractions
Schedule 511-C/511NR-C Oklahoma Adjustments
Schedule 511-D Deductions and Exemptions
Schedule 511-E/511NR-D Child Care/Child Tax Credit
Schedule 511-F/511NR-E Earned Income Credit
Schedule 511-G/511NR-F Donations from Refund
Form 511-CR Other Credits
Form 511TX Credit to Tax Paid to Another State
Form 538H Claim for Credit or Refund of Property Tax
Form 538S Claim for Credit/Refund of Sales Tax
Form 507 Statement of Person Claiming an Income Tax Refund Due a Deceased Taxpayer
Form 561 Oklahoma Capital Gain Deduction
Form OW-8-ES Oklahoma Individual Estimated Tax

Where's My Refund? - Check Your Oklahoma State Tax Refund Status

You can check your refund status by telephone by calling the Oklahoma Tax Commission at (405) 521-3160 or in-state toll free at (800) 522-8165, and select the option “Check the Status of an Income Tax Refund”. Simply provide your SSN and amount of your refund, the system will provide your refund status.

For electronically filed returns, please wait 10 days before calling. For paper filed returns, please wait six weeks before calling. File electronically or early in the tax season to get your Oklahoma state tax refund faster.

Check your Oklahoma state tax return refund status online.

OK efile Error Codes

If your Oklahoma state return was rejected, you will receive an error reject code. If you prepared and efiled your return on, we will provide you with an explanation of how to correct the error on your return. You may then resubmit your state return at no additional charge until it is accepted by the state.

View a list of all Oklahoma State efile Income Tax Return Error Reject Codes.

Oklahoma Tax Facts

OK Income Tax:

Oklahoma individual income is taxed across seven tax brackets.

The tax brackets for single taxpayers and couples filing separate returns are:

  • 0.5% for the first $1,000 of taxable income
  • 1% for incomes between $1,001 and $2,500
  • 2% for incomes between $2,501 and $3,750
  • 3% for incomes between $3,751 and $4,900
  • 4% for incomes between $4,901 and $7,200
  • 5% for incomes between $7,201 and above

The tax brackets for married couples filing joint returns, heads of household, and qualifying widows/widowers are:

  • 0.5% for the first $2,000 of taxable income
  • 1% for incomes between $2,001 and $5,000
  • 2% for incomes between $5,001 and $7,500
  • 3% for incomes between $7,501 and $9,800
  • 4% for incomes between $9,801 and $12,200
  • 5% on incomes between $12,201 and above

OK Sales Tax:

Oklahoma has a 4.5% sales tax rate. State law allows incorporated towns, counties, and cities to levy local sales and use taxes for general and specific purposes of municipal governments.

OK residents who live in the state for the entire Tax Year and have a total gross household income of $20,000 or less can file for sales tax relief. If OK taxpayers are 65 years old or older, can claim an exemption for a dependent, or are physically disabled and make up to $50,000, they are also eligible for sales tax relief.

More information on Oklahoma Sales Tax

OK Sales Tax Holiday:

Oklahoma holds one annual sales tax holiday. During this holiday, certain items are exempt from Oklahoma sales tax. It usually occurs on the first weekend of August (midnight Friday through midnight Sunday). However, OK consumers will only receive the tax exemption if a specific total spending limit is met.

Refer to the chart below for all Oklahoma sales tax holidays for 2017.

Sales Tax Holiday Dates Sales Tax Holiday Items Included
August 4-6, 2017
  • Clothing and shoes: less that $100 (excluding accessories, special clothing or footwear primarily designed for athletic activity or protective use not normally worn except when used for athletic activity or protective use, or to the rental of clothing or footwear)

OK Personal Property Tax:

Oklahoma property taxes are paid based on the value of an OK taxpayer's personal property.The county assessor, a locally elected officeholder, determines the value of most personal property in the county.

Taxpayers who own tangible personal property in Oklahoma must file a property tax return with each county where property was located on Jan. 1 of each Tax Year on or before the following March 15. Personal property is then assessed at an amount between 10% and 15% of its fair cash value.

There is a $1,000 homestead exemption of the property's assessed valuation available to homeowners who lived in their properties as of January 1. Homeowners can claim a credit for or refund of property taxes by filing Form 538-H.

Odd Tax Fact:

The Oklahoma state tax agency has a “Top 100 Tax Delinquencies” list posted on its website. It contains individuals and businesses who owe delinquent taxes, including penalties, fees, interest, and costs over $25,000 which have been unpaid for more than 90 days and for which a tax warrant has been filed.

OK State Tax Agency:

For more information, you can visit the website of The Oklahoma Tax Commission.

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