How to Close an EIN for an Estate: Letter, Form 56, and Records

To close an EIN for an estate, you send the IRS a signed letter asking it to deactivate the account tied to the number, and you do it only after every required estate tax return has been filed. The EIN itself is never truly canceled. It stays permanently assigned to the estate the way a Social Security number stays with a person. What you’re doing is telling the IRS the estate no longer exists as a taxable entity and no future returns will be filed.¹

The letter is the last step, not the first. Skip the returns and the IRS will not deactivate the account.

File the Estate’s Returns First

Three federal returns can come into play. Which ones apply depends on the decedent’s situation and the size of the estate.

The Decedent’s Final Form 1040

The executor files the decedent’s final personal income tax return, covering January 1 through the date of death. Any prior years the decedent never filed are also your responsibility. This goes on the standard Form 1040 (or 1040-SR), not on the estate’s return. Write “DECEASED,” the decedent’s name, and the date of death across the top.²

The Estate’s Form 1041

Income the estate’s assets generate after the date of death — interest, dividends, rent, business income — belongs to the estate. If that income reaches $600 or more in a tax year, the estate must file Form 1041. On what you intend as the last one, check the “Final Return” box in Item F, and check the “Final K-1” box on each Schedule K-1 sent to beneficiaries. Those K-1s tell each beneficiary what to report on their own return.³

Form 1041 is due by the 15th day of the fourth month after the estate’s tax year ends. Estates can use a calendar year or a fiscal year, so the exact deadline depends on which the executor chose when applying for the EIN.⁴

Form 706 (Only for Large Estates)

Most estates never file Form 706. It’s required only when the gross estate combined with adjusted taxable gifts made during life exceeds the federal filing threshold, which for decedents dying in 2026 is $15,000,000.⁵ If Form 706 applies, plan on requesting an Estate Tax Closing Letter as well (see below) before treating the estate as closed.

What to Put in the Deactivation Letter

There is no IRS form for this. You write a letter. Keep it short and factual. The IRS asks that it include:¹

The legal name of the estate, exactly as it appeared on the original EIN application (typically “Estate of [Decedent’s Full Name]”).
The nine-digit EIN.
Your current mailing address as executor or personal representative.
A copy of the EIN Assignment Notice (CP 575 or 147C), if you have it. This helps the IRS locate the account faster.
A brief reason for the request — that estate assets have been distributed, debts paid, and final returns filed.

If the original assignment notice is missing, include the date the estate was established and the decedent’s Social Security number so the IRS can match the request to the right file. Sign the letter as executor or personal representative.

Where to Send the Letter

The IRS lists two addresses for EIN deactivation requests, and either works for a standard estate closure:¹

Internal Revenue Service, MS 6055, Kansas City, MO 64108
Internal Revenue Service, MS 6273, Ogden, UT 84201

Send it by certified mail with return receipt requested. Processing generally takes several weeks. The IRS mails written confirmation once the account is deactivated. Keep that confirmation with the estate’s permanent records.

End Your Fiduciary Role With Form 56

Deactivating the EIN and ending your authority as fiduciary are two different things. Form 56 is what the IRS uses to track who can act for a taxpayer. You likely filed one at the start of the estate to establish authority. When the estate closes, file another Form 56 and complete Part II (Revocation or Termination of Notice) to end the fiduciary relationship.⁶

Send the termination Form 56 to the same IRS service center where the estate filed its returns.⁷ Skip this and the IRS may still treat you as the responsible party, sending future notices and inquiries your way.

Consider Form 4810 to Shorten the Assessment Window

The IRS normally has three years after a return is filed to assess additional tax. Form 4810 lets an executor ask for a prompt assessment, which cuts that window to 18 months from the date the IRS receives the written request.⁸ This is useful when you want to distribute remaining assets without worrying about a tax bill surfacing years later.

Two limits to know. First, file Form 4810 only after you’ve submitted the returns you want assessed.⁹ Second, the prompt assessment applies to income tax returns filed by the estate or on behalf of the decedent. It does not apply to Form 706.⁸

Request an Estate Tax Closing Letter if You Filed Form 706

If the estate filed Form 706, request an Estate Tax Closing Letter before treating the case as closed. This letter confirms the IRS accepted the return and that no additional estate tax is owed. It’s a separate process from the EIN deactivation and goes through Pay.gov with a $56 user fee for requests made on or after May 21, 2025.¹⁰

Before requesting it, check the estate’s IRS account transcript for Transaction Code 421, which indicates the return has been accepted or the examination is complete. If TC 421 isn’t there yet, wait at least nine months after filing Form 706 to submit the request.¹⁰ Beneficiaries and title companies often want to see this letter before treating the estate as fully settled.

State Tax Accounts Are Separate

Closing the federal EIN does nothing at the state level. Most states have their own tax IDs for estates, and you’ll need to contact the revenue department in every state where the decedent lived or held property. Many states require a final state income tax return for the estate, and some require a separate estate or inheritance tax return. Procedures vary. Some states use online portals; others require written requests similar to the federal process. Unresolved state accounts can produce notices for missing returns and, in states with successor liability laws, expose beneficiaries who received distributions to the estate’s unpaid state taxes.

Why the Paper Trail Matters

An executor who distributes estate assets without paying all taxes can be held personally liable for the unpaid amount. Federal law treats the executor as a fiduciary responsible for satisfying tax debts out of estate assets before distributions to heirs, and that liability can follow you even after the estate is nominally closed.¹¹ Filing each return, requesting prompt assessment where appropriate, getting the EIN deactivated, and filing the termination Form 56 all create documentation that shows the estate was properly wound up.

How Long to Keep the Records

The IRS says to keep records supporting a return until the period of limitations for that return expires — typically three years from filing.¹² If a return was never filed, there is no statute of limitations and the records should be kept indefinitely.

For an estate, a cautious floor is to hold the final returns, the EIN deactivation confirmation, Form 56 copies, K-1s, and IRS correspondence for at least seven years. If Form 4810 shortened the window to 18 months and that period has run, three years from the last return’s filing date is a reasonable minimum.

1
Internal Revenue Service. If You No Longer Need Your EIN
2
Internal Revenue Service. Publication 559, Survivors, Executors, and Administrators
3
Internal Revenue Service. 2025 Instructions for Form 1041 and Schedules A, B, G, J, and K-1
4
Internal Revenue Service. Forms 1041 and 1041-A: When to File
5
Internal Revenue Service. Frequently Asked Questions on Estate Taxes
6
Internal Revenue Service. Instructions for Form 56
7
Internal Revenue Service. About Form 56, Notice Concerning Fiduciary Relationship
8
Office of the Law Revision Counsel. 26 U.S. Code 6501 – Limitations on Assessment and Collection
9
Internal Revenue Service. About Form 4810, Request for Prompt Assessment Under IR Code Section 6501(d)
10
Internal Revenue Service. Frequently Asked Questions on the Estate Tax Closing Letter
11
Office of the Law Revision Counsel. 26 U.S. Code 6901 – Transferred Assets
12
Internal Revenue Service. How Long Should I Keep Records