Filing taxes for my mother who can't.

My 93 year old mom is in a memory care assisted living facility and can't prepare of file her tax returns.  She has a durable power of attorney that appoints me as her attorney in fact. The POA names me to take necessary action to prepare, sign and file any and all of her federal, state and local income tax returns for the years 2009 through 2035.  Do I need to file and specific returns or can I just prepare and efile her returns for her as indicated in the POA.