I am a full time student. I work full time. my parents DO NOT claim me as a dependent. How can I claim the proper school expense deduction?

In the personal info section, check the box that says you can't be claimed as a dependent. 

  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.

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 a credit if you are, or can be, claimed as a dependent by someone else.

Reference: Line 7 instructions for form 8863. https://www.irs.gov/instructions/i8863