In order to "add" your form 1098-T information after your return has already been e-filed and accepted, you would need to process an amendment. Please see the link below on how to process an amendment:
https://ttlc.intuit.com/replies/3288565
Should you discover that after amending your return, there was no difference and you'd like to "undo" your amendment, please see this link below:
https://ttlc.intuit.com/replies/4170678