Adult Dependents

@    Our son (45)  and his family (wife and 6 year old) moved into our house two years ago.  Our son can't work due to medical problems, the wife doesn't work either.  We pay more than 80% of their expenses (rent, utilities, car, insurance, food, etc.).  They didn't work in 2021.

 

I'm retired.

 

Is there anything I can do to lower my tax burden since my wife and I pay most of their bills?  Thanks for any and all help.