Several things to consider:
AOTC can only be taken 4 times per student. Since this is community college with very little qualified expense, it may be beneficial to wait and take it later when tuition etc. are enough to get more of the credit. of course, part of this consideration is: Will the parent's income be too high to take it in another couple of years... in that case $900 now is better than zero later...
You have to look at the actual payment history to see what was paid when. This could be a case that the scholarship was paid in 2017 but was for a course billed /paid in 2016 that had been reflected on the 2016 1098-T
If scholarship is truly greater than tuition expense, then it is taxable to the student. (Don't rely on the 1098-T- look at the record of payments!) In many cases this is moot because it would not cause tax liability to the student. Scholarship goes on line 7 of the 1040. e.g. If student has $2,200 taxable scholarship and $3,000 W-2 wages and $10 bank interest. This is still below the standard deduction, so no tax liability for the student. I have a client who's daughter has 100% scholarship for college: tuition, room , board, even football tickets, plus another $10-$15,000 scholarships from other local places. I asked: Since her expenses are fully paid where does the rest of the scholarship $$ go: Dad's reply: "They give it to her in cash" She has quite the tax liability! He is happy to pay the tax.
See Pub 970 starting on page 15: Coordination with Pell grants and other scholarships. for detailed explanation of taxing the scholarship for student in order to free up the tuition expense for the parent.