Also, are you being claimed on your parents tax return? If you are being claimed as a dependent on your parents return, you will not be able to get the credit on your own. Your parents might be eligible for the credit, if that is the case.
There's a new urban myth among college students that says they can get a $1000 from the government just for filing a tax form. For most of them, they simply aren't eligible. A full time unmarried student, under age 24, even if you don't qualify as a dependent, is only eligible for the refundable portion of the American Opportunity Credit if he supports himself by working. You cannot be supporting yourself on parental support, 529 plans or student loans & grants. It is usually best if the parent claims that credit.
You cannot claim the (up to) $1000 refundable credit if you are, or can be, claimed as a dependent by someone else.
When TurboTax sees that you are a FT student, under 24, it will add an earned income support question to the interview. The earned income support question is part of the personal info interview, not the education interview.