You will need to amend your return to add the 1098-T. Please note that you cannot e-file an amended return. They have to be mailed, and it takes up to 16 weeks for the IRS to process an amended return. 3 weeks after you mailed your amendment, you can start tracking its progress at the IRS Where's My Amended Return? site.
Amendment instructions can be found here: https://ttlc.intuit.com/replies/6602873
