How Do I File Taxes for a Deceased Person in Oklahoma?
Find out which tax returns you need to file after someone dies. See state-specific forms, deadlines, and whether tax clearance is required.
Frequently Asked Questions
At minimum, a final federal income tax return (Form 1040) and a final Oklahoma income tax return (Form 511 (Oklahoma Resident Individual Income Tax Return)) must be filed for income earned through the date of death.68 Okla. Stat. §§ 2355, 2368, 2375Verified May 27, 2026 If the estate earns income during administration, a federal fiduciary return (Form 1041) and Oklahoma fiduciary return (Form 513 (Oklahoma Resident Fiduciary Income Tax Return)) may also be required.
The final federal and Oklahoma income tax returns are due april 15 following year of death (april 20 for e-filers).68 Okla. Stat. §§ 2355, 2368, 2375Verified May 27, 2026 The fiduciary return is due april 15 for calendar-year estates; 15th day of 4th month after close for fiscal-year estates. extension via form 504-fi.
No. Oklahoma does not require a state tax clearance certificate for estate distribution. Estate tax repealed for deaths on or after January 1, 2010 (HB 1172, 2006 Sess.; former 68 O.S. §§ 801–804 stricken). No inheritance tax has ever existed in Oklahoma as a separate levy.68 Okla. Stat. §§ 2355, 2368, 2375Verified May 27, 2026 All tax obligations must be satisfied before making final distributions.
Yes. Estate size does not affect the requirement to file a final income tax return. A final Form 1040 is required regardless of estate value if the deceased had income. What smaller estates typically avoid is the federal estate tax return (Form 706).
The executor named in the will (or the court-appointed administrator) is responsible for filing the final income tax return and any estate tax returns. If the deceased was married, the surviving spouse can file a joint federal return for the year of death. For trust assets, the successor trustee handles fiduciary tax returns. The Oklahoma executor checklist covers all filing responsibilities in order.
No. Oklahoma does not impose a state estate tax or inheritance tax. The primary tax filings after death are income tax related (final return and, if applicable, estate income tax return). See how Oklahoma compares with the death tax calculator.
Your kids shouldn't have to do this.
Oklahoma Estate Planning Resources
In-depth guides covering Oklahoma probate laws, trust requirements, and estate planning strategies.
