Seeking Advice on 1098-T

Hello to all,

I am curious how or if to report a 1098-T for my son, if not claiming him for 2020 as a dependent? I am in charge of his 529, and his father and I take turns claiming him on our taxes. 2020 was his father's year, but I have made all the withdrawals for his college. Also, what is the maximum amount per year and how does Summer school impact this amount?

T.I.A.