Oklahoma Tax Forms 2018
Printable State OK 511 Form and OK 511 Instructions

Oklahoma 2018 OK 511 Form and Instructions
Free printable 2018 OK 511 Form and 2018 OK 511 Instructions booklet in PDF format to print, prepare, and mail your 2019 Oklahoma state income tax return.

Printable Oklahoma (OK) state income tax form OK 511 must be postmarked by April 15, 2019 in order to avoid penalties and late fees. Printable Oklahoma state tax forms for the current tax year will be based on income earned between January 1, 2018 through December 31, 2018. The Oklahoma income tax rate for 2018 is progressive from a low of 0.50% to a high of 5%. The OK state tax table can be found inside the Form 511 instructions booklet PDF.

Preparation of your Oklahoma income tax forms begins with the completion of your federal income tax forms. Some of the Oklahoma state income tax forms require information from your federal income tax return, for example. If you have not done so already, please begin with your federal 1040 using the links above or on the left side navigation. Remember that federal tax forms 1040EZ and 1040A have been discontinued for the 2018 - 2019 filing season.

2018 Oklahoma 511 Form and Instructions

Form 511 - Resident Packet (instructions, forms, tables)
Form 511NR - Nonresident Packet (instructions, forms, tables)

Frequently Required OK Tax Forms, Schedules, Instructions:
OW-8-ES - 2019 Estimated Tax Declaration
OW-8-ES-SUP - 2019 Annualized Estimated Tax Worksheet
OW-8-P - Worksheet for Underpayment of Estimated Tax
OW-8-P-SUP-I - Oklahoma Annualized Income Installment Method
Form 504 - Application for Extension of Time to File
Form 511CR - Schedule for Other Credits
Form 511TX - Oklahoma Credit for Tax Paid to Another State
Form 511-V - Oklahoma Individual Income Tax Payment Voucher
Form 538H - Credit for Refund of Property Taxes
Form 538S - Sales Tax Refund
Form 561 - Capital Gain Deduction
Form 561NR - Nonresident Capital Gain Deduction
Form 574 - Nonresident/Resident Allocation
Form 599 - Request for Copy of Income Tax Return

List of all printable OK state income tax forms.

Click any Oklahoma state income tax form title above to download, view, print, and save the PDF file. The PDF file format allows you to safely print, prepare, and mail in your 2018 Oklahoma state tax forms.

The Oklahoma Tax Commission will expect your 2018 income tax forms to be printed on high quality printers. Today's laser, bubble-jet, or ink-jet printers are generally acceptable. Color printing is not required, however, we recommend that you read the first few pages of the Oklahoma OK 511 instructions booklet for updates regarding the printing of your 2018 Oklahoma state tax forms.

Oklahoma State Income Tax Refund Status

To check the status of your form 511 income tax refund online, visit the Oklahoma Tax Commission website and use their Refund Status service. Oklahoma Tax Commission states that you could receive your refund in a couple of weeks if you efile compared to several more weeks longer if filing on paper. Filing your income tax return online and selecting the direct deposit option if even faster. To retrieve the status of your OK income tax refund for 2018 you will need the following information:

  • Last seven digits of Social Security Number or ITIN
  • Amount of refund requested
  • Zip code

The requested information must match what was submitted on your Oklahoma 511 state income tax forms for the current year. The Oklahoma Tax Commission refund lookup service can only be used to query the current income tax year 2018. Contact the Oklahoma Tax Commission service center by phone or mail if you are having trouble using the service or need to discuss a prior year income tax return.

To contact the Oklahoma Tax Commission service center by phone or email, use the check your refund status link above. Alternatively, view or print the 2018 Oklahoma 511 instructions to obtain the proper phone number and mailing address.

Last updated: April 6, 2019