OKLAHOMA Tax Forms and Instructions
Below are the relevant links for OK State Tax information.
Oklahoma State Mandate All specified tax return preparers must file individual income tax returns electronically. A specified tax return preparer is any preparer which reasonably expects to file more than 10 individual income tax returns during the calendar year. (IRC ?6011). The ERO retains OTC Form 511EF. Exception: If the return includes any of the forms listed, below, attach the forms to Form 511EF and mail to the Oklahoma Tax Commission following the directions on page 2, Form 511EF. ? Forms 573, 511NOL, OW-8-P-SUP-I. ? COFT?s Form?Oklahoma volunteer firefighter tax credit. Any Oklahoma statement containing additional information. ? Other state?s income tax return if Form 511TX is filed.

OKLAHOMA Tax Forms and Instructions Information
Online Credit Card Payments
  • Offical Payments
    Or call 1-800-2PAY-TAX (Offical payments charges a nominal fee for this service)(Use Jurisdiction Code 2000 for Individual and Jurisdiction Code 2006 for Business Taxes)
Mailing Addresses
  • Return Mailing Address:
    Oklahoma Tax Commission
    PO Box 269045
    Oklahoma City, OK 73126-9045

  • Return Mailing Address without Refund:
    Oklahoma Tax Commission
    PO Box 26890
    Oklahoma City, OK 73126-0890

  • Estimates Mailing Address:
    Oklahoma Tax Commission
    PO Box 269027
    Oklahoma City, OK 73126-9027

  • Amended Return Mailing Address:
    Oklahoma Tax Commission
    Post Office Box 26800
    Oklahoma City, OK 73126-0800

  • Extension Mailing Address:
    If there is no additional state income tax due and you intend to file within the period granted by the IRS, the Oklahoma Tax Commission will honor the Federal extension. Enclose a copy of the Federal extension with your filed Oklahoma return. An Oklahoma extension form 504 is required when requesting an extension beyond that granted by the IRS, or if you need to make a payment to cover your anticipated tax liability. An extension is valid only if 90 percent of the tax due is paid on or before the original due date of the return. An Oklahoma extension is not an extension of time to pay the tax, it is only an extension of time to file the return.

    Oklahoma Tax Commission
    Post Office Box 26890
    Oklahoma City, Oklahoma 73126-0890

  • Electronic Filing:
    The Oklahoma e-file program supports federal/state (MeF) filing through the Federal/State Electronic Filing Program. State only returns will not be accepted for tax year 2016. Exclusions from e-Filing. Oklahoma does not accept: ? Amended returns. ? Original returns for any tax year other than calendar years 2014 through 2016.
Federal Tax Information