Tax Year Prior to 2020: Why can't I claim the AOC?

[KarenL2]

The most common reason is if you can be claimed as a dependent on someone else's tax return.  You might want to go back to the Personal Info section and review the questions there to make sure they are marked correctly. 

Then go back to the Education section and review all of your entries there.  Make sure to read any blue text or Learn more links.

Who is eligible to take the American Opportunity Tax Credit?

https://ttlc.intuit.com/replies/5358150