Oklahoma Income Taxes and OK State Tax Forms

efile Oklahoma tax return
Oklahoma
"The Sooner State"

Oklahoma State Income Tax Return forms for Tax Year 2018 (Jan. 1 - Dec. 31, 2018) can be e-Filed together with an IRS Income Tax Return until October 15, 2019. In January 2020, you can e-File Tax Year 2019.

eFile.com makes it easy for you to e-file your IRS an Oklahoma State Tax Return (e.g resident, nonresident, or part-year resident returns). However, the IRS and the respective State Tax Agencies require you to e-file a Federal Income Tax Return at the same time you e-file a State Tax Return. This is not an eFile.com policy but an IRS and State Agency policy. Therefore, you cannot e-File an Oklahoma Tax Return anywhere - not just eFile.com - without also e-filing the associated IRS Tax Return. However, please read on for good news. 

Find detailed instructions on how you can only prepare and mail in - not eFile - an Oklahoma 2018 Tax Return - here via eFile.com. However, you must download/print and sign the forms and mail them to the Tax Agency.

Function
Description
Prepare only an OK State Return
with a State Only Code: FreeFed19
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.
Automatic 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 - instructions on how to correct a rejected Oklahoma Tax Return.

 

Start Federal and Oklahoma Tax Returns

2019 Oklahoma Income Tax Filing Deadlines by Tax Year

The majority of deadlines listed here are for Tax Year 2018. Some apply to upcoming Tax Years and some are IRS or Federal deadlines.

Deadline
Type
Description
April 15, 2019
Tax Year 2018
Income Tax Return
Prepare and e-File an IRS (Due Date April 15, 2019) and Oklahoma State Income Tax Return (Due Date April 15, 2019) until October 15, 2019. - eFileIT*
Expired:
April 15, 2019
2018 Income Tax Extension
October 15, 2019
Tax Year 2018
Income Tax Return after the April 15, 2019 Oklahoma Tax Extension
Last day to e-File a 2018 Oklahoma State Income Tax Return for Tax Extension Filers and late eFilers. You can only e-File (to file by paper see below) Oklahoma Income Tax Return together with an IRS Tax Return. eFileIT*
October 15, 2019 via mail-in Forms.
Forms incl. Mailing Address are listed below.
Tax Year 2018
Income Tax Return after the April 15, 2019 Oklahoma Tax Extension
Deadline for taxpayers who got an OK Tax Extension to file their OK Income Tax Return by mail-in Forms - the Forms incl. mailing addresses are listed below - is October 15, 2019. (Optionally, the eFileIT* deadline is Oct. 15, 2019). Instructions on how to only - without the IRS return - prepare and file an Oklahoma State Income Tax Return on eFile.com.
Tax Amendment for all Tax Years
IRS Due Dates
IRS Tax Return, Extension, Amendment Deadlines
2019, 2020, etc.
Other State Tax Return, Extension, Amendment Deadlines
Select respective State Tax Return Deadlines.
2019, 2020, etc.
IRS Federal Income Tax Return, Amendment, Extension Deadlines
April 15, 2022
2018 Oklahoma Income Tax Return Refund.
IRS Tax Return Refund Claim Deadline
The last day to file - you will not face late filing penalties - and claim your 2018 Oklahoma Income Tax Return Refund. This deadline does not apply if you owe 2018 Income Taxes.

E-File These 2018 Oklahoma State Tax Forms

Prepare and efile these state forms for 2018 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. Instructions on how to only prepare a state income tax return.

Form/Schedule
Description
efileIT Now*
Form 511
Individual Resident Income Tax Return
Form 511NR
Individual Nonresident/Part-Year Income Tax Return
Form 511CR
Other Credits
Form 538H
Property Tax Credit
Form 538S
Claim for Credit/Refund of Sales Tax
Form 561
Oklahoma Capital Gain Deduction
Form 564
Credit for Employees in the Aerospace Sector
Form 577
Refundable Coal Credit
Form 578
Refundable Credit for Electricity Generated by Zero Emissions Faculties
Form OW-8-P
Underpayment of Estimated Taxes
Extension Payment Voucher Form. Complete and submit to the OK Tax Commission - address is on the form - with your payment.
Cannot be e-Filed. Mail-in only.

* Due to IRS and State Tax Agency tax 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 all online tax web sites have to adhere to this IRS/state issued tax data sharing policy. You can however prepare all 44 State Income Tax Returns on eFile.com if you have already e-Filed or filed your IRS return. Instructions on how you can ONLY prepare and file State Income Tax Return(s). Only on eFile.com can you prepare, 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.

Automatic Oklahoma Tax Extension

For Tax Year 2018 you can e-File an IRS Tax Extension by April 15, 2019 for free on eFile.com (instructions on whether you should consider a Tax Extension or not). 

If you are certain that you cannot file your Oklahoma return by the deadline, you do not need to file for an extension. You will automatically receive a 6-month extension of time to file your return (not to pay). The extended tax return due date is October 15, 2019. Please be aware that Oklahoma will not accept the federal extension form as an extension for your Oklahoma tax return. However, if you expect to owe income taxes, you should submit your payment with payment voucher Form 504-I. If you efiled your return and are making a payment by check or money order, you must complete a Form 504-I on efile.com. If you are making a payment by credit card, a Form 504-I is not needed. If you are making an automatic extension payment, you also must use Form 504-I unless it is made electronically. Use efile.com and prepare an Oklahoma tax return to find out what your Oklahoma state income tax payment will be.

Instructions on how to eFile an IRS tax extension for free on eFile.com by April 15, 2019.

The extended IRS/Oklahoma eFile deadline is Oct. 15, 2019 - eFileIT* now. If you plan to file or mail-in an Oklahoma tax return on paper - the Forms and Mailing Address are below - your due date is Oct. 15, 2019. 

2018 Tax Year Oklahoma Tax Forms

Oklahoma State Income Tax Forms for Tax Year 2018 (Jan. 1 - Dec. 31, 2018) can be e-Filed in conjunction with a IRS Income Tax Return until October 15, 2019. Details on how to only prepare and print an Oklahoma 2018 Tax Return.  The OK Tax Forms and Mailing Address are below - click for the IRS Federal Income Tax Forms for Tax Year 2018.

Form/Schedule
Description
Individual Resident Income Tax Return
Individual Nonresident/Part-Year Income Tax Return
Other Credits
Credit to Tax Paid to Another State
Claim for Credit or Refund of Property Tax
Claim for Credit/Refund of Sales Tax
Oklahoma Capital Gain Deduction
Credit for Employees in the Aerospace Sector
Refundable Coal Credit
Refundable Credit for Electricity Generated by Zero Emissions Faculties
Oklahoma Individual Estimated Tax
Underpayment of Estimated Taxes

2017 Tax Year Oklahoma Tax Forms

Oklahoma state income tax forms for Tax Year 2017 (Jan. 1 - Dec. 31, 2017) can no longer be prepared and e-filed. Complete the respective Form(s) below, sign, and mail them to the Oklahoma Tax Commission. In addition to filing Oklahoma Forms you might also have to file the 2017 IRS Tax Return Forms.

Form/Schedule
Description
Individual Resident Income Tax Return
Individual Nonresident/Part-Year Income Tax Return
Other Credits
Credit to Tax Paid to Another State
Claim for Credit or Refund of Property Tax
Claim for Credit/Refund of Sales Tax
Oklahoma Capital Gain Deduction
Credit for Employees in the Aerospace Sector
Refundable Coal Credit
Refundable Credit for Electricity Generated by Zero Emissions Faculties
Oklahoma Individual Estimated Tax
Underpayment of Estimated Taxes

Oklahoma Tax Facts, Information

Oklahoma Tax Information and Contacts

OK Tax Type
Description
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.
Sales Tax Holiday
August 2019
  • 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)
Oklahoma 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.
Oklahoma Tax Payment Options
Oklahoma State Tax Agency Contacts
For Mailing Addresses and other contact information contact the OK Tax Commission