My father was officially diagnosed with dementia last month and the doctor signed an incompetency letter. I am his only child/daughter (57 yrs old) and his POA. It's tax time and his wife (#3) says he wants to do his own taxes this year, even though I volunteered to do them. Some of the tax documents have come to my home and I took them over to him today. When I arrived, she was already gone for the day and he was sitting at the table paying a bill, well, trying to pay a bill. It took him about 15 minutes to figure out how to write the check and for how much. I showed him the tax documents and set them on the desk in their office. We then went to lunch with my daughter. We got to talking about taxes and I asked my dad about the documents I showed him earlier, of course he couldn't remember and then said he hasn't seen any tax documents. The wife is a tough cookie, but can't seem to say no to my dad. My dad has always been secretive about his finances, so I feel stuck. I KNOW he can't do them, she thinks he can or wants him to try and I am upset at the thought of him trying and being overwhelmed and then being late. Help. This wife is difficult at best.