No one can see your tax return so we do not know. Did you get the Lifetime Learning Credit? That is a non-refundable education credit of up to $2000 that can be used to reduce your tax owed---but is not added to your refund.
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Technically there is a provision that allows a student-dependent to claim a federal tuition credit. But, from a practical matter it seldom works out. A student, under age 24, is only eligible for the refundable portion of the American Opportunity Credit (AOTC) if he/she supports himself by working. She cannot be supporting herself on student loans & grants and 529 plans and parental support. It is usually best if the parent claims that credit.
If the student actually has a tax liability, there is a provision to allow him to claim a non-refundable tuition credit. But then the parent must forgo claiming the student as a dependent, and the $500 other dependent credit. The student must still indicate that he can be claimed as a dependent, on his return. This is worth up to $2500 (AOTC shifts to all non refundable)