Educational expense deduction

I'm (trying to) entering education expenses for our daughter who is attending college. We received a Form 1098-T from her university which shows payments received for qualified tuition and related expenses. I am using the step-by-step method to enter this information. I'm at the screen for entering education expenses and the line for tuition and enrollment fees. The value for this field shows $0 and it doesn't let me edit this number. Clicking on the hyperlinked text, the explanation says "Note: You entered this number in earlier." I didn't enter anything from her form 1098-T earlier. How can I fix this?