When someone dies, the IRS still expects one more individual income tax return. It is called the final return, and it covers January 1 through the date of death. It goes on a regular Form 1040. There is no special "death form."
Most families get this return roughly right. The problems come from the edges: who has authority to sign, what income belongs on it, how a surviving spouse should file, and what happens when a refund is due. Get those wrong and the IRS sends letters to a dead person, holds the refund, or assesses tax against the wrong taxpayer.
Who is responsible for filing
The Code answers this directly. Under IRC 6012(b)(1), the return of a deceased individual is made by the executor, administrator, or other person charged with the decedent's property. In Florida, a court-appointed executor is called a personal representative. If a probate case is open in Sarasota County, that person is the filer.
If there is no probate, the duty falls on whoever is in charge of the decedent's property. That is often a surviving spouse, an adult child, or the successor trustee of a revocable trust. The law does not let the return go unfiled just because nobody went to the courthouse.
Before you file, send the IRS a Form 56, Notice Concerning Fiduciary Relationship. It tells the IRS who is acting for the decedent and where to send notices. Without it, letters keep going to the decedent's old address, and nobody reads them until a levy shows up.
When the final return is due
The due date does not change. If the person died in 2026, the final return is due April 15, 2027, the same as it would have been. IRS Publication 559, Survivors, Executors, and Administrators, confirms this. If you need more time, file Form 4868 for the automatic extension to October.
The extension is for filing, not paying. Interest and the failure-to-pay penalty still run from April 15 on any balance due.
What income goes on it
The final return picks up income the decedent actually or constructively received through the date of death, plus deductions the decedent paid through that date. Wages paid before death, interest credited before death, Social Security received before death, and capital gains from sales closed before death all belong here.
Income that arrives after death does not. A final paycheck issued after death, a dividend paid the following month, or a bonus declared later is generally income in respect of a decedent. It is taxed to whoever receives it: the estate on its Form 1041, or a beneficiary on their own Form 1040.
This is where Forms W-2 and 1099 cause trouble. Payers often issue one form under the decedent's Social Security number covering the whole year, even though part of the money went to the estate. When that happens, report the full amount on the final return and then back out the portion that belongs to the estate, with an explanation. Then report that portion on the estate's return. Skip the explanation and you will likely get a CP2000 underreporter notice down the road.
The surviving spouse and the joint return
A married couple is treated as married for the entire year of death. IRC 7703(a)(1) tests marital status at the time of death when a spouse dies during the year. That means the surviving spouse can usually file a joint return covering the decedent's income through death and the survivor's income for the full year.
Who signs depends on whether there is an executor. Under IRC 6013(a)(3), the joint return for the decedent is made by the executor or administrator. If no executor has been appointed by the due date, and none is appointed before it, the surviving spouse can sign alone and write "filing as surviving spouse" in the signature area.
There is a safety valve that surprises people. If an executor is appointed later, the executor can disaffirm the joint return by filing a separate return for the decedent within one year after the due date. That matters when joint filing would drag estate assets into the survivor's tax problem, or the other way around.
Think about this choice before you make it. A joint return means joint and several liability for every dollar on it. If the decedent had a history of IRS trouble, or the survivor does, the filing status decision has consequences that outlast the funeral. The rules for tax debt after death explain why.
For the two years after the year of death, a surviving spouse with a dependent child may qualify for the qualifying surviving spouse status under IRC 2(a), which uses joint return rates. After that, the survivor files as single or head of household.
Medical expenses: the one-year window
Final illnesses are expensive, and the bills often get paid after death. IRC 213(c) gives the executor a choice. Medical expenses paid out of the estate within one year after the date of death can be treated as paid by the decedent when the care was received, which puts them on the final Form 1040.
The catch: you cannot deduct the same dollars twice. Under Treas. Reg. 1.213-1(d), taking the deduction on the income tax return requires a statement waiving the right to deduct those amounts on the estate tax return. For the large majority of estates that owe no estate tax, the income tax deduction is the only one that does anything, so take it there. For a taxable estate, run the numbers both ways.
Deductions and carryovers that die with the taxpayer
The full standard deduction is available on the final return. It is not prorated for a partial year. Itemized deductions are allowed for amounts the decedent paid before death, plus the medical expenses covered by the 213(c) election.
Some tax attributes do not survive. Publication 559 explains that a capital loss or net operating loss the decedent incurred can be deducted only on the final return and cannot be carried over to the estate. If the decedent had a large capital loss carryover from prior years, the final return is the last place it does any good. Accountants miss this. Do not let yours.
Marking the return correctly
The Form 1040 instructions tell you to write "Deceased," the decedent's name, and the date of death across the top of the return. Use the decedent's Social Security number. If a court appointed you, sign in your capacity as personal representative.
A missing notation is not fatal, but it is an invitation for processing delays, rejected e-files, and identity theft flags. The IRS locks the accounts of deceased taxpayers once the Social Security Administration reports the death, and an unmarked return can look like a fraudulent filing.
Refunds
If the final return produces a refund, the IRS wants to know the money is going to the right person. A surviving spouse filing jointly, or a court-appointed personal representative who attaches the court certificate, can generally claim it directly. Everyone else attaches Form 1310, Statement of Person Claiming Refund Due a Deceased Taxpayer. The details are in the guide to claiming a deceased taxpayer's refund.
Balances due and old years
If the final return shows tax due, the estate owes it. It is a debt of the decedent, and it has priority. Under the federal priority statute, an executor who pays other debts or distributes to heirs before paying a known federal tax can become personally liable. Read the guide on executor personal liability before you write any checks.
The final return is also the moment many executors discover that the decedent stopped filing years ago. If that is your situation, the executor's duty to file extends to those prior years. See when a deceased parent left unfiled returns.
Close the window faster
Once the final return is filed, the IRS normally has three years to audit it under IRC 6501(a). An executor who wants to distribute the estate and move on can shorten that to 18 months by filing a request for prompt assessment under IRC 6501(d) on Form 4810. Pair that with a request for discharge from personal liability on Form 5495 and you have a clean exit. See requesting prompt assessment.
A short checklist
- Get appointed, or confirm you are the person in charge of the property.
- File Form 56 so the IRS knows who you are.
- Pull wage and income transcripts to see every W-2 and 1099 the IRS has on file.
- Decide on filing status with the surviving spouse, with an eye on joint liability.
- Split income between the final return and the estate where payers reported it all under the decedent's number.
- Consider the 213(c) election for medical bills paid within one year.
- Mark the return, sign in your fiduciary capacity, and attach Form 1310 if required.
- Request prompt assessment and discharge before you distribute.
None of this is exotic. It is a series of small decisions made in the right order. The executors who get hurt are the ones who make them in the wrong order, usually with good intentions and a checkbook.
If you are holding a stack of mail addressed to someone who is gone and you are not sure what comes first, call (813) 229-7100. Let's talk.
Frequently asked questions
When is the final Form 1040 due?
The same day it would have been due if the person had lived, normally April 15 of the year after death. An extension on Form 4868 works the same way it does for any individual. Death does not create a special deadline.
Can a surviving spouse file a joint return for the year of death?
Yes, in most cases. Marital status is tested as of the date of death under IRC 7703(a)(1), so the couple counts as married for that year. If no executor has been appointed by the due date, the surviving spouse can sign the joint return alone. A later-appointed executor can disaffirm it within one year under IRC 6013(a)(3).
Do I report income received after the date of death on the final return?
No. The final Form 1040 covers income through the date of death. Money that comes in afterward, such as a final paycheck paid after death or interest earned later, belongs on the estate’s Form 1041 or the beneficiary’s return, depending on who received it.
Does a Florida resident need to file a state return too?
Florida has no personal income tax, so there is no Florida final return. If the decedent had income sourced to another state, such as rental property up north, that state may require its own final return.