However, I did not support him in 2019
There is no requirement for the parent to provide the student any support. Not one penny. The support requirement is on the student, and "only" the student.
If the student did not provide more than 50% of their own support during the entire tax year, then the parents qualify to claim the student as a dependent on the parent's tax return. Scholarships, grants, 529 distributions, gifts from Aunt Mary, etc., *do* *not* *count* for the student providing their own support.
as he withdrew from his classes early spring semester of 2019, had a full time job, was no longer living with me
If the primary reason the student was not living physically under your roof for the entire tax year was because the student was attending school, then that time spent away at at school is considered to be time spent living under your roof. It doesn't seem to me that my statement applies to your situation.
and had a child in June 2019
Did your son get married in 2019? I am assuming he did not. But he did become a father in 2019. But you say he dropped out of college in "early spring" which I would guess would be in March of 2019? On top of that, he got a job and started working I would expect shortly after leaving college. So it "sounds" to me like your son did provide more than half of his own support for 2019. (That may not be true if your son lived with you after dropping out of college.) If so, then he just flat out does not qualify as your dependent and you can't claim any of the eudcation stuff. Your son will claim all the education stuff for 2019 on his own return.
Now if your son claims the child as his dependent (the mother actually gets first dibs on that) then the fact he's claiming a dependent on his tax return automatically by itself, negates your son from being claimed as a dependent on anyone else's tax return.
