American Opportunity Credit Confusion

Hello,

 

This year I'm really confused with the American Opportunity Credit. Turbo Tax has asked me if I've claimed this credit in previous years which I thought I have, but when I look at the 8863 form on previous years it says I have not. I'm confused because TurboTax normally says I'm eligible for the AOC which I've always claimed, so why is my past tax returns saying I didn't?