I am having the same issue in the TurboTax Home & Business edition.  Says I have already entered this number earlier, but shows zero and when I search for 1098T, it takes me back to the same place where I cannot enter anything other than books and materials.  Next I enter scholarships, and receive the message that the scholarship exceeds expenses so it is taxable.

To edit the 1098-T in TurboTax:

• From the page that says Now Let's Gather The Additional Education Expenses
• Hit Continue. You will need to continue through several screens until you get to the screen that says Your Education Expenses Summary click Edit
• At Here's Your Education Summary you can Edit, Delete or Add New School

I have same issue, I have already entered info for my daughter and want to edit it but when I click on add/edit i get following message

What's the Name of This Dependent's School?

I don't see name of my daughter or forms already entered, I don't know which dependent system is talking about.

Go through the questions until you get to Your Education Expenses Summary.  At this point you can see who is listed, Edit or add a new person, and enter all of your tuition information.