Updated October 7, 2026. Quick answer: Form 56 tells the IRS that you are acting as a fiduciary for a taxpayer, such as an executor, trustee or guardian, or that the relationship has ended. It is filed under section 6903, and under section 6036 for receivers and assignees. You file one form for each person you act for, with the IRS Service Center where that person files returns.
IRS trust and estate tax forms, read line by line: Form 1041-ES payment vouchers, Form 4810 and Form 4810 filing.
IRS estate-administration forms, read line by line: Form 56 lines 3 to 5, Form 56 Part II and Form 56 Parts III and IV.
More IRS forms and schedules, read line by line: Form 8821 instructions and Form 4506-T instructions.
What Form 56 is for
“Form 56 is used to notify the IRS of the creation or termination of a fiduciary relationship under section 6903 and give notice of qualification under section 6036.”
The filing duty belongs to “A fiduciary (see Definitions, later) who seeks to act on behalf of a taxpayer before the IRS or to inform the IRS that the fiduciary capacity has terminated”. The section 6036 notice is narrower: “Receivers and assignees for the benefit of creditors also file Form 56 to give notice of qualification under section 6036.”
The instructions explain why it matters: “A fiduciary is treated by the IRS as if the fiduciary is actually the taxpayer.” The duties that follow, such as filing returns for the person or estate, are described for estates on the Form 1041 page.
Who counts as a fiduciary
“A fiduciary is any person in a position of confidence acting on behalf of any other person.” The list of examples is broad: “Examples of fiduciaries include administrators, conservators, designees, executors, guardians, receivers, trustees of a trust, trustees in bankruptcy, personal representatives, persons in possession of property of a decedent’s estate, or debtors-in-possession of assets in any bankruptcy proceeding by order of the court.”
Two warnings sit nearby. Form 56 is not a power of attorney: “Do not use Form 56 if you’re notifying the IRS that you’re the authorized representative of the taxpayer. Instead, use Form 2848, Power of Attorney and Declaration of Representative.” Nor does it change addresses: “Form 56 cannot be used to update the last known address of the person, business, or entity for whom you’re acting.” The instructions point to Form 8822 or Form 8822-B for that.
Part I: identification and Section A authority
Each person you act for gets a form. “File a separate Form 56 for each person for whom you’re acting in a fiduciary capacity.” The instructions illustrate it with a decedent: if you will file the decedent’s final Form 1040 as executor, you file one Form 56 naming the decedent and one naming the estate. If there is more than one fiduciary, “each fiduciary must file a separate Form 56 or otherwise provide notice of their status to the IRS.”
A count, computed here from those two rules: an executor and a co-executor acting for both the decedent and the estate would produce 2 forms each, or 4 in total, unless the other fiduciary gives notice another way.
Line 1 asks for the source of your authority. Line 1a is for a testate estate: “Check the box on line 1a if you’re the executor of an estate of a decedent who died testate (that is, having left a valid will) and have been authorized to serve by a court of appropriate jurisdiction.” “Attach to your Form 56 current letters testamentary or a court certificate as proof of your court appointment.”
Line 1b covers an administrator of an intestate estate with a court appointment, line 1c a court-appointed guardian, custodian or conservator, and line 1d an intestate estate with no court appointment. “Check the box on line 1e if you were named a trustee under a valid instrument.” Line 1f covers bankruptcy, assignments for the benefit of creditors and receivers, and line 1g is for other proceedings. One caution applies throughout: “You must be prepared to furnish evidence that substantiates your authority to act as a fiduciary.”
Identifying numbers, dates and Section B
The identifying number depends on who you act for. “If you’re acting for an individual, an individual debtor, or other person whose assets are controlled, the identifying number is the social security number (SSN) or individual taxpayer identification number (ITIN).” “If you’re acting for a person other than an individual, the identifying number is the employer identification number (EIN).”
Line 2a is the date of death, used with lines 1a, 1b and 1d. Line 2b is the date of appointment or transfer of assets, used with lines 1c, 1e, 1f and 1g. Section B then states the tax scope: “Check the appropriate box(es) indicating the type of tax and forms you will be filing in performance of your fiduciary duties.” The printed form lists income, gift, estate, generation-skipping transfer, employment and excise taxes on line 3, and form numbers on line 4 that include the 1040 and 1041. The instructions do not otherwise discuss Form 1041 or Form 8821.
If your authority is partial, line 5a applies: “If your authority does not cover all years or tax periods, check the box on line 5a and list the specific years or periods within your authority on line 5b.”
Part II: ending the relationship, Parts III and IV
“Complete Part II only if you’re revoking or terminating a prior notice concerning a fiduciary relationship.” Ending your role does not end the duty for the next person: “Completing Section B or C does not relieve any new or substitute fiduciary of the requirement to file a Form 56 or to otherwise give notice.”
Part III is narrow: “Complete this part only if you have been appointed a receiver, trustee, or fiduciary by a court or other governmental unit in a proceeding other than a bankruptcy proceeding.” Part IV is the signature: “Sign Form 56 under penalty of perjury and enter a title describing your role as a fiduciary”. Estate-specific reporting that follows, such as beneficiary statements, is on the Schedule K-1 for estates page.
When and where to file
“Generally, you must file Form 56 when you create (or terminate) a fiduciary relationship.”
The destination follows the taxpayer: “File Form 56 with the Internal Revenue Service Center where the person for whom you’re acting is required to file tax returns.” The instructions send Form 1040 filers to the Form 1040 instructions for the address.
Receivers and assignees have a deadline and a different office: they “must file Form 56 on or within 10 days of the date of appointment.” That filing goes to the IRS Insolvency function in Dallas, Texas, at the address in the instructions. For executors, see also the executor liability page.
Which revision applies
The edition read for this page is the Form 56 and instructions marked Rev. June 2026, dated June 10, 2026, which are the revision irs.gov served when they were read on 2026-10-07. A later revision can change line numbers, so check them against the form you are filing. “For the latest information about developments related to Form 56 and its instructions, such as legislation enacted after they were published, go to IRS.gov/Form56.”
Common mistakes
- Using Form 56 as a power of attorney. The instructions send authorized representatives to Form 2848.
- Filing one form for a decedent and the estate together. The instructions call for one Form 56 naming the decedent and another naming the estate when you are doing both.
- Leaving out proof of authority. A testate executor attaches current letters testamentary or a court certificate with line 1a.
Related: Form 1041 for estates, successor trustee first steps, the executor liability trap, and Schedule K-1 for estates.
Sources
- Instructions for Form 56 (Rev. June 2026): https://www.irs.gov/pub/irs-pdf/i56.pdf
- Form 56 (Rev. June 2026): https://www.irs.gov/pub/irs-pdf/f56.pdf
Read from the IRS documents linked above on October 7, 2026. General information, not tax advice. Your own facts decide the outcome, and a preparer, the account provider or the IRS is the right place to confirm anything consequential.