Have you filed your tax return?
If you have, you can return to the program to make corrections without amending only if your return is being rejected. If your return is accepted, to add or change information, you will have to amend it. You cannot go back and edit.
If your return got rejected for any reason, you can return to the program/account to edit information along with other changes and re-submit it. For instructions, click here Fix a reject 2019. You do not need to file an amendment 1040-X.
If you have not filed, to enter a Form 1098-T, here are the steps:
In TurboTax online,
I have the same problem. When I jump to the 1098t link it just says I already entered 0. There is no way to enter the correct amount.
Go through the entire education interview until you reach a screen titled "Your Education Expenses Summary". Click edit next to the student's name. That should take you to a screen “Here’s your Education Summary”. Click edit next to the section you want to change; tuition, in your case (click edit next to the school name).
Use the Chrome browser and first clear it of browsing data for all time.
On the Chrome browser
Click the three dots in the upper right corner
Select Settings
Privacy and Security
Clear browser data for all time
Then sign in to TurboTax on the Chrome browser
Go to Tax Tools, Tools, Delete a Form and delete 1098-T Worksheet and Education and Fees Summary
Go to the program
To qualify for the American Opportunity Credit, your 2020 modified adjusted income or MAGI can't exceed $90,000 ($180,000 if filing jointly).
For the Lifetime Learning Credit, your 2020 MAGI can't exceed $69,000 ($138,000 if filing jointly).