Since he is being claimed as a dependent for 2021 those questions will not appear for his return. A person who is being claimed as a dependent is not eligible so the questions do not even appear. He does not have to pay it back if he received it last year. And...since you are claiming him for 2021, you will get it on your own return.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
