Oklahoma Income Taxes

efile Oklahoma tax return
"The Sooner State"

Prepare and e-file your current year Oklahoma state tax return - resident, nonresident, or part-year resident returns - with your IRS return via eFile.com.

  • State return only regulations*): Per IRS and Oklahoma state tax agency regulation - not eFile.com - you can NOT just prepare and e-file a state return (with the exception of California) without also e-filing the IRS return on the same platform. If you have filed your federal return already, you can prepare an Oklahoma state return on eFile.com and then download, print, and sign the return before you mail it in. See instructions on ONLY preparing and mailing in an Oklahoma and/or other state tax returns.
  • File your OK and IRS returns together on eFile.com.

OK Tax Help and Resources

Oklahoma State Income Tax Rate: 4.75%
Estimate your OK income taxes now.
Compare other state income tax rates.
Where Is Your Oklahoma Tax Refund Money?
Step 1: Sign into your eFile.com account and check acceptance by the tax agency.
Step 2: Check your Oklahoma tax refund status.
Where Is Your IRS Refund?
Step 1: Sign into your eFile.com account and check acceptance by the IRS.
Step 2: Check your IRS Tax Refund Status.
Oklahoma Income Tax Extension
Oklahoma Income Tax Amendment
How to Correct a Rejected Tax Return
If your OK Tax Return was rejected by the OK Tax Agency - not eFile.com - see instructions on how to correct a rejected Oklahoma tax return.
How to Pay Income Taxes
Oklahoma IRS Late Filing, Tax Payment Penalties

1. Late Filing Penalty: There is only a late payment penalty as detailed below.

2. Late Payment Penalty: A delinquent penalty is charged when at least 90% of the tax is not paid by the deadline. The penalty amounts to 5%. A one-time 5% delinquent penalty and interest accruing at 1.25% per month will be charged on any taxes owed not paid by the original tax return due date.

3. IRS Penalties: Calculate and estimate your potential IRS income tax return penalties.
OK Tax Return Mailing Addresses
Find various Oklahoma mailing addresses for tax returns, tax amendments, and tax payments.
Oklahoma Income Tax Brackets
Oklahoma Income Tax Forms
View or download OK income tax forms by year.
Oklahoma Unemployment Benefits
Oklahoma applies state taxes to unemployment income like the federal level.
Oklahoma Marriage Penalty

Start Federal and Oklahoma Tax Returns

e-File These Oklahoma State Tax Forms

Prepare and e-file these state forms for current tax year in conjunction with your federal and state income tax return. As you proceed through the tax interview on eFile.com, the application will select the correct state forms for you. You can also select tax forms individually. All these forms will then be e-filed by you to the state tax agency. See instructions on how to only prepare a state income tax return.

OK Tax Form Current Tax Year
OK-W-4 - Employee’s State Withholding Allowance Certificate
OW-8-ES - Oklahoma Individual Estimated Tax Worksheet for Individuals
504-I - Application for Extension of Time to File an Oklahoma Income Tax Return for Individuals
511 - Oklahoma State Tax Resident Individual Income Tax Return
511-V - Oklahoma Individual Income Tax Payment Voucher
511CR - Other Credits Form
511NR - Oklahoma Nonresident / Part-Year Individual Income Tax Return
538-H - Claim for Credit or Refund of Property Tax
561 - Oklahoma Capital Gain Deduction for Residents Filing Form 511
564 - Credit for Employees in the Aerospace Sector
577 - Refundable Coal Credit
OW-8-P - Underpayment of Estimated Tax Worksheet

* Due to IRS and state tax agency data sharing and validation requirements, you can only e-file a state income tax return while also e-filing a federal income tax return. This is not an eFile.com created policy, but a federally regulated one which all online tax filing websites have to adhere to. You can, however, prepare all 44 state income tax returns on eFile.com if you have already e-filed or filed your IRS return. View instructions on how you can ONLY prepare and file state income tax return(s). Only on eFile.com can you prepare and file or e-file unlimited state tax returns for one low price and not pay for each state return like you would do on H&R Block® vs. TurboTax®. Dare to compare now.