For the 2025 Oklahoma state income tax filing season, taxpayers generally use Form 511 to file an Oklahoma resident individual income tax return or Form 511-NR for a nonresident or part-year resident return. The 2025 Oklahoma individual income tax return is generally due April 15, 2026.
Farm Income Averaging
- Taxpayers with qualifying farm income may use Form 573, Farm Income Averaging, to determine whether they qualify for Oklahoma farm income averaging.
- The form provides the applicable instructions and calculation for averaging eligible 2025 farm income over the prior three base years.
State Subtractions
- Oklahoma provides certain subtractions from federal adjusted gross income under state law.
- Common examples include qualifying U.S. government obligation interest, Social Security benefits, and certain federal civil service retirement benefits.
- Applicable subtractions are reported according to the instructions for the appropriate Oklahoma schedule.
Investment/New Jobs Credit
- Oklahoma provides an Investment/New Jobs Credit for qualifying taxpayers that meet the applicable investment or employment requirements.
- Form 506, Investment/New Jobs Credit, provides the eligibility requirements, calculation methods, and carryover rules.
- Taxpayers should review the current Form 506 instructions to determine whether they qualify and how to claim the credit.
2025 Tax Changes
- For tax year 2025, Oklahoma added an exemption for employers providing paid leave to an employee for the purpose of volunteering as a poll worker with a county election board in Oklahoma.
- The Electric Vehicle Charging Tax Credit was also added to Form 511-CR. Taxpayers claiming this credit must provide Form 579 and applicable supporting documentation. Form 579 is the 2025 Electric Vehicle Charging Tax Credit form.
Filing and Payment
- Taxpayers should follow the current Form 511 or Form 511-NR instructions for filing requirements, payment procedures, extensions, schedules, and supporting documentation.
- If mailing a balance due, taxpayers should follow the current Form 511-V instructions for payment.
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Disclaimer: Always verify details with the official Federal or State Department of Revenue Forms and Instructions. For complex tax situations, consult a CPA or tax attorney.