I received a corrected Form 1098 after filing and the return was accepted. Only box 2 changed and the amount of the principal went up. Do I have to amend my return?

[JamesG1]

Perhaps, if you filed using the standard deduction, put the form with your other tax documents.  You will likely not need to refer to them again.

If you filed itemizing deductions including mortgage interest, you may want to check to see whether your 2021 tax return will change for the better or worse after reporting the corrected IRS form 1098.  You would have to amend your accepted 2021 tax return and enter the corrected form into the TurboTax software to see whether you would owe additional tax or be owed a refund.

1. Sign in to the TurboTax account where you filed your 2021 tax return.
2. On your Tax Home, scroll down to Your tax returns & documents, select 2021, then Amend using TurboTax Online
   • If you would like to amend your 2021 return using the TurboTax Amend CD/Download software, select the link for your operating system (Windows or Mac) to download the software. (You'll also need to download the .tax file for your 2021 return, which you can do from Your tax returns & documents).
3. On the screen OK, let's get a kickstart on your 2021 amended return, select the reason(s) you're amending and Continue.
4. Answer the questions on the following screens. The Refund Monitor will reset to $0—don’t worry, this is normal for amended tax returns.
5. When you reach Here's the info for your amended return, select Start next to the info you'd like to change, then select Done.
6. Carefully answer the remaining questions to finish amending your return.

[jazzyalyssa]

I did file using the standard deduction. Does that mean I don't have to amend?

[KrisD15]

Correct, you do not have to file an amended return

because you choose the Standard Deduction 

AND because the amount of principal paid makes no difference on your tax return.