Turbo Tax says that I have already entered my son's tuition, but it shows up as $0. Where would I have entered that already?

[Hal_Al]

Q. Where would I have entered that already?

A. You didn't.  You most likely accidently skipped that page.

Go through the entire education interview until you reach a screen titled "Your Education Expenses Summary".  Click edit next to the student's name. That should take you to a screen “Here’s your Education Summary”. Click edit next to the section you want to change; tuition, in your case (click edit next to the school name).