Oklahoma (OK) State Income Tax Return Forms, Free E-Filing and Government Information

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Oklahoma State Tax Filing Information  

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The eSmart Tax online tax return filing solution makes it easy to efile your Oklahoma state tax return using the correct state tax forms. Prepare your full-year resident Oklahoma state tax return alongside your federal tax return for your convenience.

The regular deadline to file an Oklahoma state income tax return is April 15, but Oklahoma offers a special deadline date for electronically filed returns. If you efile your return, you can file on or before April 20.

Find additional information about Oklahoma state tax forms, Oklahoma state tax filing instructions, and government information.

eSmart Tax supports the following Oklahoma Tax Forms (Click here to download Oklahoma tax forms)
Supported   Oklahoma Form 511
Individual Resident Income Tax Return  
Supported   Oklahoma Form 511-EF
Oklahoma Individual Income Tax Declaration for Electronic Filing  
Supported   Oklahoma Form 511-V
Individual Income Tax Payment Voucher  
Liberty eSpecial: $50 Off Tax Prep!  
Liberty eSpecial  
State OK Website and Contacts  
State Website   http://www.tax.ok.gov/
Taxpayer Assistance:   (405) 521-3160 or
(800) 522-8165 (In-State Only)
Refund Status (Automated Response):   (405) 521 -3160
Special Processing  
Type:   Availability:  
State-only tax return: Not supported
Decedent Return: Supported
Return with foreign address: Supported
State OK Amount Owe Payment Option  
You have the following options to pay your tax:
  1. Pay by Direct Debit from bank account. You need to make sure your bank supports direct debit.
    OK support both Direct Debit and Deposit  
  2. Mail in a check.

    Mail check to:
    Oklahoma Tax Commission
    Income Tax
    P.O. Box 26800
    Oklahoma City, OK 73126-0800

    Enclose a check or money order payable to "Oklahoma Tax Commission".

  3. Send e-payment through state website.
  4. Send credit card payment through third-party website.
Availability:   Type:   Notes:  
Supported Same as federal N/A
State Return Type  
Residency:   Return Type:   Status:  
Resident OK-511 Available
State OK Overpayment Option  
You have the following options:
  1. Apply your refund amount to next year's tax payment.
  2. Contribute your refund amount to charity.
  3. Receive your refund by check through mail.
  4. Receive your refund by direct deposit to your bank account.