How Do You File Taxes for Someone Else Using a Power of Attorney?
Stepping in to handle a family member’s taxes because of illness, distance, or age can feel straightforward, until it becomes clear that the power of attorney drawn up by an estate lawyer doesn’t automatically work for tax filing purposes.
The short answer
Filing taxes on someone else’s behalf generally requires a specific tax authorization form recognized by the government, separate from a general power of attorney used for other financial or medical decisions. This specific form spells out exactly what the appointed person is allowed to do — sign a return, discuss the account, receive notices — rather than granting broad authority the way a general document might.
Why a general power of attorney often isn’t enough
A general power of attorney drafted for banking, property, or healthcare decisions doesn’t automatically transfer to tax matters, because tax agencies typically require their own designated form and process for recognizing a representative. Without that specific authorization on file, an agency generally won’t discuss the account or accept a signed return from someone other than the taxpayer, even if that person holds a broad and valid power of attorney for everything else in the person’s life.
What the specific authorization typically allows
The tax-specific form usually spells out which tax matters and which years the authorization covers, and it can be limited narrowly — say, to a single year’s return — or written more broadly to cover ongoing correspondence. It generally allows the designated person to sign returns, respond to notices, and discuss account details, but the exact scope depends on what’s specified on the form itself. This matters especially when someone is also filing a final return for a deceased person, since that situation involves different authority than acting for a living person who is simply unable to file themselves.
How the signature process generally works
When someone signs a return under this kind of authorization, they typically note their role and attach or reference the authorization on file, rather than signing as if they were the taxpayer. This creates a paper trail showing the return was filed with proper authority. If the authorization hasn’t been submitted and processed ahead of time, filing a return can be delayed while the paperwork is sorted out, which is why people who anticipate needing to act on someone else’s behalf — due to travel, illness, or cognitive decline — often benefit from setting this up before it becomes urgent.
Other situations that call for something similar
- Ongoing correspondence. Someone managing a parent’s affairs long-term may want standing authorization to receive notices and respond to routine account questions, not just sign one return.
- Working through backlogs. A representative helping resolve older issues, like setting up an installment agreement for back taxes, generally needs the same authorization on file before the agency will discuss the account.
- Requesting more time. Someone filing on another person’s behalf may also need to coordinate a filing extension if records are incomplete or the person being represented is unavailable to weigh in.
The takeaway
Acting on someone else’s behalf at tax time depends on having the right authorization, not just any authorization. Confirming that a tax-specific form is in place, understanding exactly what it covers, and setting it up before a filing deadline approaches all go a long way toward avoiding delays when someone else needs to step in.