How do I know if the American opportunity credit has been maxed out as a dependent on parents previous tax forms? Halftime Junior

I have been enrolled in school for more than 4 years without achieving 4 years of credits and I am currently only enrolled half-time. This is also a second time filing independent, so I'm unsure if my parents have claimed this credit while I was a dependent in the past. I don't want to claim this credit if it means I'll end up owing on taxes next year!