This may not affect your return at all since the tax tables are raised in $50 increments. You can add $10 to your return just to see if it makes any difference in your results.
If not, you should retain in your file so that you have it for your records if a question should come at any future date.
To add the interest so that you can check to see if there is a change, first save a copy of your return as originally filed by selecting the "Download/Print" button from your home screen (see image attached). Then save the file to your computer or print it.
Then you can select "Amend/Change return" from your Tax Timeline. You don't really have to amend, but you can add the interest to see if anything changes.
The instructions here will take you to your Form 1099-INT entry screens.
- Sign into your TurboTax Account - online
- Select My Account in the upper right, then Tools
- Select Topic Search (image attached)
- Search for 1099int, then Go
- Continue to enter your information
