Solved
I have 1098t and inputted the info. It states Aaron cannot claim the credit (true) but I am working on my tax return and Aaron is my dependent. I have claimed this in the past and should be able to claim it again this year.
It may be that your taxable income is over the qualifying limit. You could see if it's better to not claim your son and he claim himself for the credit. However I believe he has to have earned enough income to support himself for more than half of the year.
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