Tax Resources
State And Federal

Efile Oklahoma State Tax Returns

  • Oklahoma State Tax Filing Information  

    eSmart Tax Guarantee  

    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  
    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: Supported
    Decedent Return: Supported
    Return with foreign address: Supported
    State OR 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.
      You need to attach Payment Voucher (Form 511-V)

      Mail check to:
      Oklahoma Tax Commission
      Income Tax
      PO 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: Notes:
    Resident OK-511 N/A
    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.