How Do I File Taxes for a Deceased Person in Missouri?

The final federal and Missouri income tax returns are due april 15 following year of death (automatic 6-month extension with federal extension).RSMo 143.481, 143.501, 143.511; RSMo 473.397Verified Jun 1, 2026 The fiduciary return is due 15th day of 4th month after close of tax year (april 15 for calendar year); automatic extension with federal extension (form 7004) or mo-60. rsmo 143.551..

No. No mandatory pre-distribution tax clearance for estates. Form 943 (Request for Tax Clearance) available voluntarily to confirm no outstanding MO tax liabilities. State taxes are priority class 8 claims under RSMo 473.397.RSMo 143.481, 143.501, 143.511; RSMo 473.397Verified Jun 1, 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 Missouri executor checklist covers all filing responsibilities in order.

No. Missouri 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 Missouri compares with the death tax calculator.