How do I add two 1098-T forms? I changed from Lane Community College to Grand Canyon University in June, 2021

You can edit your tuition amounts or add another 1098-T from the Education Summary Page, try these steps:

When you are signed in to your tax return, you can type 1098-t into the search bar at the top of the page and click on the link to get back to the education section in TurboTax. You will be taken to the education section but the exact screen you will land on depends on where you left off. Click through the screens until you get to the Expenses Summary, which will list all students on your return. You can add another student at this point. 

In order to change the tuition amounts or add a 1098-T, you will need to click on Edit, next to the name of the student on the screen titled Your Education Expenses Summary. 

That will take you to a screen titled Here's Your Education Summary.  From this screen, you can edit the tuition amounts by clicking on Edit next to the name of the school.  Or, if you need to add another 1098-T, click on the blue link that says Add New School on that page.

The program allows you to enter at least 5 (might be 10) 1098-T forms. after entering the first one and working it through, just click the "Add another 1098-T" button.