My father passed away in November. He didn't pay any tax on his income but the medical expenses he paid brings his tax burden to zero. Do I need to file taxes for him?

I started doing Turbo Tax for my deceased father and when I put in his medical expenses for the medical care facility he was in and paid for it showed he didn't owe any taxes (it was the same when I did it last year).  I filed a return last year because he was due a refund.  This year he paid no taxes so he doesn't owe and is not getting a refund.  Do I need to file to file a Federal or State return for him?