Thanx, all.
Yep, I already roughed out a spreadsheet for my calculations:
$55,000 tuition - $40,000 grants - $1,700 CHET 529 plan (only $200 potentially taxable) = plenty for AOC. Parents are older (adopted kids from China) and dad now has dementia and can't work, so they will qualify for the AOC. I'm entering in my electronic notes to the parents' tax return, as well as the student's.
Just to add to the complexity, the 1098-Q has the student's name but a SSN that does NOT belong to anyone in the family, totally different digits.