I have a new client who needs to file four years of returns for her ill mother. She has a signed & notarized POA. How do I handle this? Does the daughter sign the returns? Attach the POA to the returns? Attach the POA and attach either a Form 2848 and CA FTB Form 3520 to the returns?
I would attach to each return a copy of the PoA and an explanation of why the taxpayer is unable to sign. Ideally the PoA should specifically refer to the ability to sign tax returns, but you work with what you are given. I'm assuming you don't have and can't get a Form 2848.
