If the tax return was already filed, it should not be cleared and started over. Instead, it should be amended.
See: How do I amend my 2020 TurboTax Online return?
If the tax return was not already filed, to get the question to appear again, run through the existing education information. To return to the education section, from inside TurboTax, enter education and click the Jump to link in the search results.
TurboTax will maximize any credit and there will be a page shown telling you which credit you could receive.
Then there will be a screen that says Just one last thing...Have you receive a letter or notice form the IRS stating you must file Form 8862 in order to claim the American Opportunity Credit? and follow the prompts.
@Frustrated1601
