Oklahoma state tax filing

File Federal for $0 and add Oklahoma for just $15.99.

We'll help you file both returns at once.

Start 2025 return

Federal $0State $15.99

State Return

$15.99

Save time and avoid errors by filing your federal and state return together.

  • File federal and state together
  • Prepare with a few clicks
  • E-File and direct deposit included
  • Max refund guaranteed

Federal Return

Simple/Advanced

Guaranteed free

$0All Tax Situations
  • Guaranteed 100% accurate
  • 350+ deductions and credits
  • Filing history, compare this year with last year
  • Print past and current tax returns at any time

Includes Basic features

Guaranteed free

$0Simple tax returns
  • Guaranteed 100% accurate
  • 350+ deductions and credits
  • Filing history, compare this year with last year
  • Print past and current tax returns at any time

Includes Premium features

Guaranteed free

$0Investments and rental income
  • Rental property income
  • Import prior year information
  • Home ownership. Write off interest and property taxes
  • Deduction for your Health Savings Account

Includes Self-Employed features

Guaranteed free

$01099 income and expenses
  • All 1099 forms supported
  • Complex tax situations
  • Small business income
  • Asset depreciation
  • Uncommon income, home sale, tuition distributions, etc.
Start 2025 return

Oklahoma tax details

Oklahoma made a few changes for tax year 2025.

There is now an exemption for employers providing paid leave to an employee for the purpose of volunteering as a poll worker with a county election board in Oklahoma.

There is a new Electric Vehicle Charging Tax Credit for taxes on an electric vehicle. The amount of credit allowed for the Credit for Railroad Modernization is 80.93% of the total amount this year.

The voluntary donation to the Y.M.C.A. Youth and Government Program was removed.

2025 Oklahoma tax forms

These are the supported Oklahoma state tax forms on FreeTaxUSA:

  • Form 511
    Oklahoma Resident Income Tax Return

  • Schedule 511-A
    Oklahoma Subtractions

  • Schedule 511-B
    Oklahoma Additions

  • Schedule 511-C
    Oklahoma Adjustments

  • Schedule 511-D
    Oklahoma Itemized Deductions

  • Schedule 511-E
    Oklahoma Deductions and Exemptions

  • Schedule 511-F
    Oklahoma Child Care/Child Tax Credit

  • Schedule 511-G
    Oklahoma Earned Income Credit

  • Schedule 511-H
    Oklahoma Donations from Refund

  • Schedule 511-I
    Oklahoma Amended Return Information

  • Form 511-NR
    Oklahoma Nonresident/ Part-Year Income Tax Return

  • Schedule 511NR-1
    Income Allocation for Nonresidents and Part-Year Residents

  • Schedule 511NR-A
    Oklahoma Additions

  • Schedule 511NR-B
    Oklahoma Subtractions

  • Schedule 511NR-C
    Oklahoma Adjustments

  • Schedule 511NR-D
    Oklahoma Itemized Deductions

  • Schedule 511NR-E
    Oklahoma Child Care/Child Tax Credit

  • Schedule 511NR-F
    Oklahoma Earned Income Credit

  • Schedule 511NR-G
    Oklahoma Donations from Refund

  • Schedule 511NR-H
    Oklahoma Amended Return Information

  • Form 511-CR
    Oklahoma Other Credits Form

  • Form 511-EIC
    Oklahoma Earned Income Credit Worksheet

  • Form 511-TX
    Oklahoma Credit for Tax Paid to Another State

  • Form 511-W
    Oklahoma Individual W-2 Data Sheet

  • Form 538-H
    Oklahoma Claim for Credit or Refund of Property Tax

  • Form 538-S
    Oklahoma Claim for Credit/Refund of Sales Tax

  • Form 504-I
    Oklahoma Application for Extension of Time to File

  • Form 511-EF
    Oklahoma Individual Income Tax Declaration for Electronic Filing

  • Form 511-V
    Oklahoma Individual Income Tax Payment Voucher

  • Form 591-D
    Parental Choice Tax Credit for Qualified Homeschool Expenses

  • Form OW-8-ES
    Oklahoma Individual Estimated Tax Coupon

Frequently asked questions

2025 Oklahoma filing deadlines

Keep these Oklahoma state deadlines in mind as you do your taxes.

  • Individual tax returns
    Due by April 15, 2026 (Invalid Date if you e-file)

  • Oklahoma tax extension
    If you expect a refund, your state extension is automatic with a federal extension.
    If you expect to owe OK taxes, submit Form 504-I with payment by April 15, 2026.

  • Income tax payment
    Due by April 15, 2026 (Invalid Date if you e-file and pay online)

  • Tax returns for extension filers
    Due by October 15, 2026

2025 Oklahoma refunds

Ways to receive your refund

Get your Oklahoma refund deposited in your checking or savings account, loaded on a prepaid debit card, or put towards next year's Oklahoma taxes.

Refund status for e-filed tax returns

If you filed your Oklahoma tax return electronically, you can usually check your OK refund status 4-5 business days after the Oklahoma Tax Commission accepts your return.

Refund status for mailed tax returns

If you mailed your Oklahoma tax return, you should wait 3 to 4 weeks before checking your OK refund status. Once processed, it may take 5 to 7 business days for your refund to appear in your bank account or on a prepaid debit card.

How to check your refund status

Check your OK refund status online.
Call the Oklahoma Taxpayer Service Center at (405) 521-3160.

2025 Oklahoma state tax payments

Oklahoma has many income tax payment options. Find the option that works best for you below.

Pay with direct debit

Use this option when you e-file with us.

Pay with a card

Visit Oklahoma's website and click "Make a Payment" to pay online using your credit card or bank account.

Due by April 15, 2026 (Invalid Date if you e-file)

Pay by mail

Send Form 511-V with a check or money order to the address listed on the form.

Due by April 15, 2026

2025 Oklahoma extension

An extension extends the time you have to file your return until October 15, 2026. If you need to pay taxes, you are required to pay the amount due by April 15, 2026.

You need to pay 90% of your taxes by April 15, 2026. If you pay late, you may be charged a 5% late penalty and interest (1.25% per month) on any unpaid taxes.

If you expect an Oklahoma refund:

Your Oklahoma extension is automatic with an accepted federal extension. If your federal extension is not accepted, an Oklahoma extension can be requested with Form 504-I.

If you expect to owe Oklahoma taxes:

Submit Form 504-I with payment by April 15, 2026.

Oklahoma prior year taxes

Even though the deadline has passed, you can still prepare Oklahoma taxes for prior years. Many people who file late tax returns have refunds waiting for them. We'll help you prepare and mail your federal and state tax returns.

Customer reviews

Ver todos los opiniones

Seguro y privado

Proteger tus datos personales es nuestra prioridad. Lee cómo te los aseguramos.

Seguridad y privacidad

Declaración federal gratuita para todos

Inicia declaración del 2025