As POA paying for overnight care in sister's home, food, electric, water. Sister & bil have elderly uncle in their home. They ask for payment for companion care, overnight care, food, meds. I am POA and have been paying from uncle's checking account. Want everything to be as transparent as possible. Bil has not provided any invoices for companion and overnight care yet. Have indicated they want payment for increased utility use for uncle. How do we figure this? Am I responsible for tax return for 2015 for uncle? what docs should I have to justify care costs.