To enter your 1098-T:

Click the magnifying glass in the upper right corner of your screen. 

Type in: Jump to 1098-T 

A button that says Go to 1098-T will display. Please click it. 

You will be brought to a screen where you can enter your tuition expenses. Follow the interview questions closely. You will need to ensure that you enter a student. 

Go through the entire education interview until you reach a scree 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.

If you bypass the interview questions because you haven't received your 1098T from the school yet, then try to go back, it won't give you the option.  You can't edit the tuition amount or even get back to the initial questions.  It keeps coming back to the section after that on books and expenses.  How do you get back to the beginning to enter the tuition and school identifier, etc?  All other areas on turbotax take you back to the beginning but this one it seems.

What about not online? I clicked ahead once before entering tuition, then when I want back the ability to enter tuition was gone. It now says $0 and will not let me edit. Probably will have to start the whole return over.

You do not have to.  Hal_Al had the right answer.

Go through the entire education interview until you reach a scree 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.