No, you can't add your 1098-T Tuition form after you've e-filed it unless your return gets rejected. If you e-filed your return and it was accepted by the IRS, you'll have to amend your 2019 income tax return, after the IRS processes it. Note: the IRS has not finalized the 2019 Form 1040-X, Amended U.S. Individual Income Tax Return. Please check to see when the form is tentatively scheduled to be finalized: IRS forms availability table for TurboTax individual (personal) tax products .Once the IRS has finalized Form 1040-X and processed your return, see How to amend (change or correct) a return you already filed? Related Information: What does it mean to "amend" a return? Do I need to amend? Will amending delay my original tax refund? What is the deadline for filing an amended return? Can I e-file my 1040X to amend my return? The Bipartisan Budget Act of 2018 - what's in it for you