Can I change my answer for if I had a school expense in 2018?

[LinaJ2018]

If you have not filed, yes you can. 

To edit your information, return to the Education section:

• Sign into your account and select Take me to my return 
• At the right upper corner, in the search box, type in 1098t and Enter (Upgrade might be prompted)
• Select Jump to form 1098T 
• Follow prompts