A third party designee is a person named on the taxpayer’s own tax form, by checking a box on the return, to discuss that specific tax return and tax year with the IRS (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111). It is the narrowest of the standard authorizations. It attaches to one return, it carries no power to represent anyone, and it expires on its own without being revoked.
That narrowness is the reason it exists. A firm that wants the IRS to be able to call somebody about a processing question does not need a power of attorney to arrange it, and the checkbox is the version of that permission the return itself can grant.
How the Authorization Is Made
On the individual return, a taxpayer who wants to allow a preparer, a friend, a family member, or any other person of their choosing to discuss the return with the IRS checks the “Yes” box in the Third Party Designee area of the return, and enters the designee’s name, phone number, and any five digits the designee chooses as their personal identification number (IRS, Instructions for Form 1040, 2025, Third Party Designee).
Two details in that sentence get missed at the desk. The PIN is chosen by the designee rather than assigned by the IRS, and the employment tax version of the instruction is explicit that what goes in the box is the specific person to speak with, not the name of the firm that prepared the return (IRS, Instructions for Form 941, Third-Party Designee).
What a Designee May Do
Checking the box authorizes the IRS to call the designee to answer any questions that may arise during the processing of the return, and it authorizes the designee to do four things: give the IRS any information that is missing from the return, call the IRS for information about the processing of the return or the status of a refund or payments, receive copies of notices or transcripts related to the return upon request, and respond to certain IRS notices about math errors, offsets, and return preparation (IRS, Instructions for Form 1040, 2025, Third Party Designee).
The employment tax list is shorter and one difference matters operationally. On Form 941 the designee may supply missing information, call about processing, and respond to certain IRS notices about math errors and return preparation that the taxpayer has shared with them, and the instructions state plainly that the IRS will not send notices to the designee (IRS, Instructions for Form 941, Third-Party Designee). Anyone assuming a designee will simply start receiving the mail is reading the individual return’s rule onto a payroll return.
What a Designee May Not Do
The exclusions are stated as a single sentence and each limb is a real limit. A taxpayer checking the box is not authorizing the designee to receive any refund check, to bind the taxpayer to anything including any additional tax liability, or to otherwise represent the taxpayer before the IRS, and expanding the authorization means looking to Publication 947 (IRS, Instructions for Form 1040, 2025, Third Party Designee). The Form 941 instructions carry the same bar on binding and on representation (IRS, Instructions for Form 941, Third-Party Designee).
Representation is the line that gets crossed by accident. A designee can answer a processing question and can respond to a math error notice, and that is where the authority stops. An examination, an appeal or a collection matter is representation, and representation requires an authorization the checkbox does not grant.
When It Ends
The designee authorization is self-terminating, which is what separates it from a power of attorney, and the expiry is written differently on different forms.
Individual return. For the 2025 Form 1040, the authorization automatically ends no later than the due date, not counting extensions, for filing the 2026 tax return, which the instructions state is April 15, 2027, for most people (IRS, Instructions for Form 1040, 2025, Third Party Designee).
Employment tax return. The Form 941 authorization automatically expires 1 year from the due date, without regard to extensions, for filing that Form 941, and either the taxpayer or the designee may terminate it earlier by writing to the IRS office for their location (IRS, Instructions for Form 941, Third-Party Designee).
Application for an employer identification number. The Form SS-4 designee is the shortest lived of all. The Third Party Designee section is completed only where the applicant wants to authorize the named individual to receive the entity’s EIN and answer questions about the completion of Form SS-4, and that designee’s authority terminates at the time the EIN is assigned and released to the designee. The signature area must be completed for the authorization to be valid (IRS, Instructions for Form SS-4).
The IRS’s own summary of the authorization types states the rule in one line: a third party designee authorization ends one year from the due date of the relevant tax return (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111). A taxpayer can also choose to revoke any authorization at any time (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111).
Where It Sits Among the Other Authorizations
The IRS describes four, and they are not interchangeable (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111).
| Authorization | What it does |
|---|---|
| Power of attorney | Allows someone to represent a taxpayer in tax matters before the IRS, and the representative must be an individual authorized to practice before the IRS |
| Tax information authorization | Appoints a person to review or receive a taxpayer’s confidential tax information for the type of tax for a specified period |
| Third party designee | Designates a person on the taxpayer’s tax form to discuss that specific tax return and tax year with the IRS |
| Oral disclosure | Authorizes the IRS to disclose the taxpayer’s tax information to a person the taxpayer brings into a phone call or meeting with the IRS about a specific tax issue |
Two of those expire on their own and two do not. Third party designees and oral disclosures expire automatically, while a power of attorney and a tax information authorization stay in effect until the taxpayer revokes the authorization or the representative withdraws it (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111).
None of it moves the obligation. Even with an authorized third party representing them, taxpayers are ultimately responsible for meeting their tax obligations (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111).
Common Questions
Anyone the taxpayer chooses. The individual return instructions name a preparer, a friend, a family member, or any other person the taxpayer chooses, and the employment tax instructions name an employee, a paid tax preparer, or another person (IRS, Instructions for Form 1040, 2025, IRS, Instructions for Form 941). There is no credential requirement, because there is no representation. That is the opposite of a power of attorney, where the representative must be an individual authorized to practice before the IRS, a status covered from the practitioner’s side in CPA versus enrolled agent.
That one return, for that one tax year. Processing questions, missing information, refund or payment status, and certain notices about math errors, offsets and return preparation (IRS, Instructions for Form 1040, 2025). A different year, or a different tax, is outside the authorization even where the same person prepared both.
A different authorization with a different name. Form 8821 is the tax information authorization, which appoints a person to review or receive confidential tax information for the type of tax for a specified period, and it does not expire on its own; it stays in effect until the taxpayer revokes the authorization or the representative withdraws it (IRS, Know the Different Types of Authorizations for Third-Party Representatives, Tax Tip 2023-111). The checkbox designee is scoped to one return and dies on a date.
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