| Form 500 | Information Return | 10/01/2013 |
| Form 500A | Information Return - Production Payments | 09/17/2013 |
| Form 500B | Information Return - Report of Nonresident Member Income Tax Withheld | 09/17/2013 |
| Form 501 | Annual Information Return (reconciliation for Forms 500, 500A and 500B) | 12/10/2013 |
| Form 504 | Application for Extension of Time to File | 10/21/2014 |
| Form 505 | Injured Spouse Claim and Allocation (not to be filed with the return) | 09/17/2013 |
| Form 506 | Investment/Jobs Credit (you will also need Form 511CR) | 10/06/2014 |
| Form 507 | Statement of Person Claiming Refund Due a Deceased Taxpayer (not to be filed with return) | 06/04/2014 |
| Form 511 NOL | Oklahoma Net Operating Loss - Full Year Residents Only | 10/28/2014 |
| Form 511 NOL-NR | Oklahoma Net Operating Loss(es) - Nonresident/Part-Year Resident Only | 10/28/2014 |
| Form 511 | Individual Resident Income Tax Return | 01/05/2015 |
| Form 511CR | Schedule for Other Credits | 12/03/2014 |
| Form 511EF | Individual Income Tax Declaration for Electronic Filing | 10/06/2014 |
| Form 511NR | Individual Nonresident/Part-Year Income Tax Return | 01/05/2015 |
| 511NR-Pckt | Individual Nonresident/Part-Year Income Tax Return Packet (instructions, forms and tables) | 11/17/2014 |
| 511-Pckt | Individual Resident Income Tax Return Packet (instructions, forms and tables) | 01/21/2015 |
| Form 511TX | Oklahoma Credit for Tax Paid to Another State | 11/13/2014 |
| Form 511-V | Oklahoma Individual Income Tax Payment Voucher | 10/06/2014 |
| Form 512 | Corporate Income Tax Return (form and schedules) | 01/05/2015 |
| Form 512E | Return of Organization Exempt from Income Tax | 10/06/2014 |
| 512-Pckt | Corporate Income Tax Return Packet (form and instructions) | 11/17/2014 |
| 512S-Pckt | Small Business Corporate Tax Return Packet (form and instructions) | 11/17/2014 |
| 514-Pckt | Partnership Information Return Packet (form and instructions) | 01/23/2015 |
| Form 528 | Agricultural Exclusion Information Return | 11/19/2014 |
| Form 529 | Small Business Guarantee Fee Credit (you will also need Form 511CR) | 10/06/2014 |
| Form 538H | Credit for Refund of Property Taxes (low income taxpayers) | 10/08/2014 |
| Form 538S | Sales Tax Refund | 10/21/2014 |
| Form 561 | Capital Gain Deduction (for residents filing Form 511) | 10/06/2014 |
| Form 561C | Capital Gain Deduction (for corporations filing Form 512) | 10/15/2014 |
| Form 561NR | Capital Gain Deduction (for part-year and nonresidents filing Form 511NR) | 09/30/2014 |
| Form 561P | Capital Gain Deduction (for nonresident partner included in Composite Return - Form 514, Part 1) | 10/15/2014 |
| Form 561S | Capital Gain Deduction (for nonresident shareholders whose income is reported on Form 512-S, Part 1) | 10/15/2014 |
| Form 562 | Film or Music Project Credit (you will also need Form 511CR) | 10/06/2014 |
| Form 564 | Credit for Employees in the Aerospace Sector (you will also need Form 511CR) | 09/30/2014 |
| Form 565 | Credits for Employers in the Aerospace Sector (you will also need Form 511CR) | 10/06/2014 |
| Form 567-A | Credit for Investment in a Clean-Burning Motor Vehicle Fuel Property | 10/15/2014 |
| Form 569 | Reporting Form for the Transfer or Allocation of a Tax Credit | 10/21/2014 |
| Form 573 | Farm Income Averaging | 10/21/2014 |
| Form 574 | Nonresident/Resident Allocation | 01/02/2015 |
| Form 576 | Natural Disaster Tax Credit | 09/30/2014 |
| Form 577 | Refundable Coal Credit | 10/21/2014 |
| Form 578 | Refundable Credit for Electricity Generated by Zero-Emission Facilities | 10/21/2014 |
| Form 599 | Request for Copy of Income Tax Return | 06/19/2012 |
| Form A-100 | Disclosure of Tax Information Authorization | 07/17/2012 |
| Form EF | Oklahoma Income Tax Declaration for Electronic Filing (for Form 512, 512-S or 514) | 10/14/2014 |
| Form EF-V | Business Filers Income Tax Payment Voucher (for Form 512, 512-S or 514) | 11/10/2014 |
| Form L-21 | Innocent Spouse Relief | 09/09/2014 |
| Form OW-8-ES | Estimated Tax Declaration for Individuals (for tax year 2015) | 10/21/2014 |
| Form OW-8-ESC | Estimated Tax Declaration for Corporations - 2015 | 10/21/2014 |
| Form OW-8-ES-SUP | Annualized Estimated Tax Worksheet (for tax year 2015) | 11/19/2014 |
| Form OW-8-P | Worksheet for Underpayment of Estimated Tax | 11/04/2014 |
| Form OW-8-P-SUP-C | Oklahoma Annualized Income Installment Methods for Corporations and Trusts | 11/19/2014 |
| Form OW-8-P-SUP-I | Oklahoma Annualized Income Installment Method for Individuals | 10/21/2014 |
| Form OW-9-MSE | Annual Withholding Tax Exemption Certification For Military Spouse | 12/03/2010 |
| Packet S | Application for Settlement of Tax Liability | 12/22/2014 |
