Form 56 vs. Form 8822-B: What Does Each Change?

November 13, 2026 · 2 min read

Form 56 tells the IRS about the creation or termination of a fiduciary relationship. Form 8822-B is the business form for updating an address or responsible party. A court appointment or trust document may explain a fiduciary's authority, while a business update still needs its own facts and filing.

What to check

Start by identifying the taxpayer named on each document. An estate and an LLC can have different records even when they are connected by ownership. The Form 56 instructions distinguish a fiduciary from a representative appointed through Form 2848. They also explain how a fiduciary identifies the tax periods within their authority and when proof of appointment is needed. Use Form 8822-B for an actual change to the LLC's business record. Verify the signer and the scope of the change before submitting either form.

Example

An executor is appointed to administer an estate that holds an LLC interest. The executor first documents the appointment and identifies the estate's IRS records. The LLC then separately reviews whether its responsible party or business mailing address actually changed. The estate appointment alone does not provide the LLC's new mailing address or resolve who can sign for the company.

Before you proceed

Write down the taxpayer name and identifier for each record.
Keep the instrument or court document showing who can act.
Record the affected addresses, roles and effective dates separately.

Can Form 56 update the business mailing address?

The IRS instructions direct business address changes to Form 8822-B.