How to Sign a Tax Return as Power of Attorney

Signing someone else's tax return under a Power of Attorney (POA) is the one POA task where the usual assumption is wrong. People file IRS Form 2848 and assume it lets them sign, but it doesn't, at least not on its own. Get this wrong and the return can be treated as unsigned, which means it isn't validly filed.

This guide explains the difference between representing and signing, the limited situations the IRS actually allows an agent to sign a return, and how to do it correctly.

Form 2848 Lets You Represent, Not Automatically Sign

IRS Form 2848 (Power of Attorney and Declaration of Representative) authorizes you to act for the taxpayer before the IRS: responding to notices, speaking with agents, handling an audit. That is "representation."

Signing the actual return is different. The authority to sign a return is not granted just because you filed a 2848. The IRS treats signing as a separate, higher-bar power that must be specifically authorized and that only applies in a few defined situations.

This is the single most common misunderstanding, and it is why so many online guides are wrong.

When an Agent Can Actually Sign a Return

Under the IRS rules (Treasury Regulation 1.6012-1(a)(5)), an agent may sign a taxpayer's return only when the power of attorney specifically authorizes it and one of these applies:

1. Disease or injury: the taxpayer is physically or mentally unable to sign.
2. Continuous absence from the United States for at least 60 days before the filing deadline.
3. Specific permission from the IRS: you request and receive authorization for other good cause.

If none of these applies, the taxpayer is expected to sign their own return (and can authorize you to prepare and represent, just not sign).

How to Sign Correctly

When you do qualify:

1. Make sure the POA authorizes signing returns. A general 2848 is not enough; the power to sign must be granted. On Form 2848, the specific authority to sign is noted on line 5a.
2. Sign the return with the taxpayer's name and your name, indicating you are signing as agent/attorney-in-fact.
3. Attach the power of attorney to the return.
4. Attach a short statement explaining the basis, for example, disease or injury, or continuous absence from the U.S.

For state returns, check that state's department of revenue, which may have its own POA form and rules separate from the IRS.

Representing vs. Signing: Keep Them Straight

| Action | What it covers | What you need | | --- | --- | --- | | Represent | Calls, notices, audits, account matters | Form 2848 | | Sign the return | Putting a valid signature on the filing | POA that specifically authorizes signing and a qualifying situation (disease/injury, 60-day absence, or IRS permission) |

Common Mistakes to Avoid

Assuming Form 2848 lets you sign. It authorizes representation. Signing needs specific authority and a qualifying reason.

Signing without a qualifying basis. If the taxpayer can sign, they should. Signing for them outside the allowed situations can make the return invalid.

Forgetting to attach the POA and explanation. The IRS needs to see your authority and the reason. Without them, the return may be rejected as unsigned.

Signing for someone who has died. A POA ends at death. The estate's executor or personal representative signs the final return, not the former agent.

Because the rules here are narrow and the stakes (a return treated as unfiled) are real, many families have a tax professional confirm the return is signed and filed correctly.

Frequently Asked Questions

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