Form 56: Notice Concerning Fiduciary Relationship
Notifies the IRS that a fiduciary relationship exists and identifies the fiduciary responsible for the assets and tax obligations of an estate, trust, or other entity.
Overview
IRS Form 56, Notice Concerning Fiduciary Relationship, is the mechanism by which a fiduciary formally notifies the Internal Revenue Service that they have assumed — or are terminating — responsibility for the tax obligations of another person or entity. The form applies to executors and administrators of decedents' estates, trustees of trusts, guardians, receivers, and other parties acting in a representative capacity under IRC Section 6903. By filing Form 56, the fiduciary ensures that all IRS correspondence, notices, and tax obligations are directed to the correct responsible party rather than the decedent, incapacitated individual, or dissolved entity.
The legal basis for this notification requirement is IRC Section 6903, which obligates any fiduciary who acts in a capacity that displaces or supplements the taxpayer to give notice to the IRS. Without a properly filed Form 56, the IRS may continue to issue notices to the decedent or the prior responsible party, potentially causing the fiduciary to miss critical deadlines for tax payments, audits, or deficiency notices. The form is closely tied to Form 1041 (U.S. Income Tax Return for Estates and Trusts), Form 706 (United States Estate Tax Return), and Form 709 (United States Gift Tax Return), since the fiduciary is typically responsible for filing one or more of these returns.
Form 56 is not itself a tax return and carries no standalone tax liability. It is an administrative notice with significant procedural consequences. Most CPA firms advise filing Form 56 as early as possible in the estate or trust administration process — ideally concurrently with the first fiduciary tax return — to establish a clear chain of authority with the IRS and prevent administrative delays. The form must be filed separately with the IRS service center where the decedent or entity filed its most recent return.
Who Files This Form?
Any individual or entity acting as a fiduciary for a taxpayer must file Form 56 to notify the IRS of that relationship. The most common filers are executors and administrators of a decedent's estate, trustees of testamentary or inter vivos trusts, guardians or conservators of individuals who are incapacitated or minors, and receivers or assignees acting under court appointment. Corporate fiduciaries — such as a bank acting as trustee — must file just as individual fiduciaries do.
A new Form 56 must be filed each time a fiduciary relationship begins and again when it ends. If there are co-fiduciaries, each one may file a separate Form 56, or one fiduciary may be designated to receive all IRS correspondence on behalf of the group, provided a clear designation is made.
There is no income or asset threshold that triggers or exempts the filing obligation. The duty to file arises from the nature of the relationship, not the size of the estate or trust. However, if an estate is small enough that no fiduciary tax return (Form 1041, 706, or 709) is required, the practical need to file Form 56 diminishes — though many practitioners still recommend it for clean administrative records.
Notable exceptions and edge cases: A surviving spouse who inherits assets outright and files a joint return generally does not need Form 56 for that portion. A trustee of a revocable living trust during the grantor's lifetime typically does not file Form 56 while the grantor is alive and filing their own return, since the trust is disregarded for tax purposes. The obligation activates when the grantor dies or the trust becomes irrevocable and requires separate tax reporting. Bankruptcy trustees follow similar but distinct rules and should consult the specific instructions.
Key Fields
Part I — Identification (Decedent/Taxpayer Information)
This section identifies the taxpayer on whose behalf the fiduciary is acting — the decedent's name, Social Security Number or EIN, and address. For estates, use the decedent's SSN until the estate obtains its own EIN, then update accordingly. Errors here are the leading cause of IRS correspondence being misdirected.
Part I — Fiduciary Name and Address
Enter the full legal name and current mailing address of the fiduciary — the person or institution actually receiving IRS mail going forward. If a corporate trustee is the fiduciary, use the institution's name and address. This is the address the IRS will use for all future correspondence related to the taxpayer's account.
Part I, Line 2a — Fiduciary's EIN or SSN
The fiduciary must provide their own taxpayer identification number, not the decedent's or the estate's. Individual fiduciaries typically use their SSN; corporate fiduciaries use their EIN. Leaving this blank will delay IRS processing and may prevent the notice from being properly associated with the fiduciary's account.
Part I, Section B — Authority for Fiduciary Relationship
Check the appropriate box indicating the source of the fiduciary's authority: will, court appointment, valid trust instrument, or other document. If court-appointed, you will also need to complete Part III with the court's name, docket number, and date of appointment. This establishes the legal basis for the IRS to recognize the fiduciary's authority.
Part I — Type of Taxes and Tax Forms
Specify which tax types and return forms the fiduciary will be responsible for — for example, income taxes (Form 1041), estate taxes (Form 706), or gift taxes (Form 709). Being specific here is important: a fiduciary listed only for income tax purposes is not automatically recognized as the responsible party for estate tax purposes.
Part I — Tax Years or Periods
Indicate the specific tax years or periods covered by this fiduciary appointment. For estates, this is typically the date of death forward through the expected duration of administration. Open-ended or imprecise entries can create ambiguity if the IRS later questions whether the fiduciary was responsible during a particular audit period.
Part II — Revocation or Termination of Notice
This section is completed when the fiduciary relationship ends — for example, when an estate is closed, a trust is terminated, or a new fiduciary is substituted. Filing a termination notice is just as important as the initial filing; without it, the IRS may continue to hold the former fiduciary responsible for future notices and liabilities.
Part III — Court and Fiduciary Information
Required when the fiduciary's authority derives from a court order. Enter the name of the appointing court, the docket or case number, and the date of appointment. This provides the IRS with independent verification of the fiduciary's authority and is often cross-referenced during estate tax audits.
Signature and Date
The fiduciary must personally sign and date the form under penalties of perjury. If a corporate fiduciary is filing, an authorized officer must sign. A return preparer or power-of-attorney holder cannot sign Form 56 in place of the actual fiduciary — this is a common source of rejected filings.
Filing Deadlines
No penalty for the form itself, but failure to notify the IRS of a fiduciary relationship may complicate estate administration.
Step-by-Step Instructions
- 1
Obtain the estate or trust's Employer Identification Number (EIN) before or concurrently with preparing Form 56 — the EIN is typically secured by filing Form SS-4, and the Form 56 should reflect the estate's EIN rather than the decedent's SSN once issued.
- 2
Gather all legal authority documents: the decedent's will with probate letters testamentary, court appointment orders, trust instrument, or other governing document that establishes the fiduciary relationship. You will need specific details such as the court name, docket number, and date of appointment for Part III.
- 3
Complete Part I in full, entering the decedent's or taxpayer's identifying information in Section A, then the fiduciary's full legal name, address, and TIN in the fiduciary fields. Double-check that the fiduciary's TIN is the fiduciary's own number, not the estate's or decedent's.
- 4
Check the appropriate boxes under the 'Authority' section to indicate whether the fiduciary's authority derives from a will, court order, trust instrument, or other source, and complete Part III if court appointment is involved.
- 5
Specify the applicable tax types and form numbers (e.g., Form 1041 for income, Form 706 for estate tax) and enter the relevant tax periods in the designated fields. Be as specific as possible rather than leaving these fields vague.
- 6
If you are filing to terminate a fiduciary relationship, complete Part II instead, indicating the reason for termination (e.g., estate closed, successor fiduciary appointed) and the effective date.
- 7
Have the actual fiduciary — not the CPA or EA — sign and date the form under penalties of perjury. If a corporate fiduciary is involved, ensure an authorized officer signs.
- 8
Mail the completed Form 56 to the IRS service center where the decedent or taxpayer filed their most recent federal return. There is no e-filing option for Form 56 as of the current year; it must be submitted by paper.
- 9
Retain a copy of the filed Form 56 along with proof of mailing (certified mail with return receipt is strongly recommended) in the estate or trust administrative file, as you may need to reference it during audits or when corresponding with the IRS.
Common Mistakes to Avoid
Using the decedent's SSN as the fiduciary's TIN in the fiduciary identification section.
The fiduciary must enter their own SSN or EIN — not the decedent's. The decedent's SSN belongs in the taxpayer identification section only. Conflating the two causes IRS records to become tangled and can delay correspondence routing.
Failing to file a termination notice (Part II) when the fiduciary relationship ends.
A second Form 56 should be filed completing Part II when the estate is closed, the trust terminates, or a successor fiduciary takes over. Without it, the IRS may continue to hold the original fiduciary responsible for future tax matters.
Having the CPA or tax preparer sign the form rather than the actual fiduciary.
Form 56 must be signed by the fiduciary personally. A power of attorney (Form 2848) does not authorize a representative to sign Form 56 on the fiduciary's behalf. Return the form for the fiduciary's original signature before mailing.
Filing Form 56 to the wrong IRS service center.
The form must be filed with the service center where the decedent or taxpayer filed their most recent return, which may differ from where the fiduciary or CPA is located. Confirm the correct address using the IRS instructions for Form 56 before mailing.
Leaving the tax types and tax period fields blank or overly vague.
Specify each applicable tax type (income, estate, gift) and the corresponding form numbers and periods. A Form 56 that does not clearly identify the tax years covered may not be recognized as authorizing the fiduciary to receive IRS notices for a specific audit or liability period.
Assuming Form 56 replaces Form 2848 (Power of Attorney) for CPA representation purposes.
Form 56 establishes the fiduciary relationship between the IRS and the fiduciary — it does not authorize the fiduciary's CPA to represent them before the IRS. A separate Form 2848 must be filed if the CPA needs to act on the fiduciary's behalf in IRS communications.
Frequently Asked Questions
Form 56 should be filed as soon as possible after the fiduciary is appointed — ideally at or before the time the estate's first federal tax return is filed. Filing early ensures that all IRS notices and correspondence are routed to the executor or administrator rather than the decedent's last known address. Delays in filing Form 56 can result in missed deficiency notices or audit correspondence.
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