If Taxpayer A was a legal or equitable owner of the property, then yes.
You didn't specifically say who the mother co-owns the property with, but if Taxpayer A's name is on the title, there should be no problem. If the mother didn't actually pay any of the deductible expenses, she cannot claim a deduction for them.
Pay the loan off and then collect payments from the person you cosigned for.
you and the party you cosigned have to talk to who you have the note with and they should be able to help you out
A cosigner is only responsible for the items that he has cosigned for.
if you are from 'merica
No, you would have to redo the loan.
Unfortunately if you cosigned a loan that means you were willing to pay the loan if the other signer defaults and if that happen they will go by any means to collect that money that you "cosigned/said" you would cover if the other person defaults. I would go after that person that you cosigned for if it has gone this far.
No.
yes it can
Yes.
Very little, you will have to pay.
As far as the auto loan you cosigned for, nothing will happen as long as the person who actually borrowed the money makes the payments on time.
Only if the parents cosigned the note.