How to amend https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed

If Turbotax didn't include the ed credit, it may be because you were not eligible. See

https://ttlc.intuit.com/questions/2956076-why-am-i-receiving-0-return-for-american-opportunity-credi...

 https://www.irs.gov/Individuals/AOTC   

https://www.irs.gov/individuals/llc

A student, under age 24, 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. You must have actually paid tuition, not had it paid by scholarships & 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.