When a Deceased Parent Left Unfiled Tax Returns

It happens more than you would think. A parent who was meticulous about everything else simply stopped filing. Maybe it started with a health scare, or a spouse's death, or a year when the paperwork felt like too much. Then one year became five, and five became ten.

Now they are gone, and you are the executor. You have the unopened envelopes, a box of 1099s, and a feeling in your stomach. Here is the truth: this is a paperwork problem far more often than it is a money problem. But it is your paperwork problem now.

The duty passes to you

IRC 6012(b)(1) says the return of a deceased individual shall be made by the executor, administrator, or other person charged with the decedent's property. That applies to the final return and to every earlier year the decedent was required to file and did not.

The duty is administrative, not personal. You are filing on behalf of the decedent, and any tax is owed by the estate. Your personal exposure arises from how you handle the money while those debts are outstanding. Distribute the estate before the IRS is paid, with knowledge of the unfiled years, and you can become personally liable under 31 U.S.C. 3713(b). The guide to executor personal liability covers that risk.

First, tell the IRS who you are

Before you file anything, file Form 56 listing every year you know or suspect is unfiled. That gets IRS mail routed to you and lets you deal with the IRS directly on the decedent's behalf.

Second, find out what the IRS already knows

You do not need to reconstruct the decedent's life from shoeboxes. The IRS already has most of the information returns. Request wage and income transcripts for each unfiled year. They show W-2s, 1099-Rs from pensions and IRAs, SSA-1099s, 1099-INT and 1099-DIV, 1099-B brokerage sales, and other third-party reports. Request account transcripts too, to see whether the IRS has already assessed anything.

The guide to getting IRS transcripts for a deceased taxpayer explains how an executor requests them. The IRS generally makes wage and income transcripts available for about ten years back.

Then fill the gaps. Brokerage year-end statements give you cost basis that a 1099-B may not. Bank statements show deductible payments like property taxes and charitable gifts. Medical bills matter, because retirees with large medical expenses often owed less than the gross income suggests.

What if the IRS already filed for them?

When someone stops filing, the IRS may eventually prepare a return for them under IRC 6020(b). These substitutes for return use only the income the IRS knows about, with no itemized deductions, no cost basis on stock sales, and usually the least favorable filing status. They overstate tax. Sometimes wildly.

An SFR is not the last word. The executor can file an original return for the year. If the original return shows less tax and is accurate, the IRS will generally process it and reduce the assessment. That alone can cut a decedent's balance dramatically, especially where a brokerage sale was taxed as if the stock had a basis of zero.

How many years?

There is no statute that says "file six years." IRC 6501(c)(3) provides that when no return is filed, tax can be assessed at any time. In theory, every unfiled year is open forever.

In practice, the IRS follows Policy Statement 5-133 (IRM 1.2.1.6.18). As IRM 4.12.1.3 summarizes it, the enforcement period generally is not to be more than six years, though the IRS can go longer or shorter depending on the facts. Most decedent cases resolve by filing six years plus the final year. The details on that policy, and on reconstructing records, are covered on the getirshelp.com page on unfiled tax returns.

But a decedent case has one twist that cuts the other way. Refunds.

Refund years first

Many retirees who stopped filing were overwithheld. Pension and IRA distributions often have tax withheld at source, and Social Security may not be taxable at all at modest income levels. So some of those unfiled years may show refunds, not balances.

Refunds expire. Under IRC 6511, a refund claimed on a late original return is generally limited to tax paid in the three years before the return is filed, and withholding counts as paid on the original due date. Every month you wait, the oldest refund year may slide out of reach. File the refund years first, then the balance-due years. The details are in the guide to claiming a deceased taxpayer's refund.

The IRS can offset refunds against balances in other years, so the net result depends on the whole picture. That is another reason to get every year's numbers before deciding what to file and when.

Penalties and interest

Balance-due years will carry the failure-to-file penalty under IRC 6651(a)(1), up to 25 percent of the unpaid tax, and the failure-to-pay penalty under IRC 6651(a)(2), plus interest. These are civil penalties. They survive death and are owed by the estate.

Penalty relief is available in some cases. Serious illness, cognitive decline, or the death of a spouse who handled the finances can support reasonable cause, if the facts are documented. Medical records and the timeline matter. The IRS evaluates the decedent's circumstances, not the executor's.

Criminal exposure does not survive. A deceased person cannot be prosecuted, so there is no criminal case to worry about. The IRS can still assert civil penalties, including the civil fraud penalty under IRC 6663, but it has to prove fraud by clear and convincing evidence, and simply not filing is not fraud by itself.

Joint years with a surviving parent

If your parents were married during the unfiled years, there is another decision to make. A surviving spouse can file joint returns for those years with the executor, or each side can file separately. Joint filing often produces less total tax, but it makes the surviving parent jointly and severally liable for every dollar. Separate filing keeps the debts apart but may cost more.

When one parent was the earner and the other was not, and the estate has enough to pay, joint filing is often fine. When the estate is short and the surviving parent has assets of their own, the math changes. Run both versions before anyone signs.

Paying what is owed

Once the returns are filed and assessed, the estate pays the balance from estate assets, ahead of most other creditors and ahead of the heirs. If the estate cannot pay in full, the IRS will look at what the estate has. An offer in compromise for an estate is possible but tightly limited.

After the balances are resolved, request prompt assessment and a discharge from personal liability before final distribution.

The sequence, in one place

1. Get appointed, then file Form 56.
2. Pull wage and income and account transcripts for every year in question.
3. Identify refund years and file them first.
4. Prepare the balance-due years, replacing any SFRs with accurate originals.
5. Request penalty relief where the facts support it.
6. Pay or resolve the balance before distributing.
7. Request prompt assessment and discharge, then distribute.

Your parent left a mess. That does not make it your fault, and it does not make it unfixable. It makes it a project.

One more check: where did your parent live during the unfiled years? Florida has no personal income tax, so years as a Florida resident involve only federal returns. Years spent living in another state may carry that state's filing requirements as well.

If you are staring at years of unfiled returns for someone who has passed, call (813) 229-7100. Let's talk.