Confused about 1040-SR for Deceased Person

So... I'm filing on behalf of my mom, who passed early last year. It's a simple return. It now knows she is deceased and asks who is submitting the return. But, when it gets done and tells me I have to print and mail the forms, the SR shows no indication she is deceased and the only place to sign appears to be wanting her to sign, showing her as Retired. There is no place for a 3rd party to sign, other than for a Paid Preparer.

 

It seems like TT does not carry over the pertinent information of being deceased and someone else submitting the return to the forms themselves. OR, do I just sign for her and make some kind of notation?