Get your taxes done using TurboTax

If your refund is reduced by 30% it is likely because when you added the interest, you lost a credit of some sort.  The best way to tell exactly what is changing is to look at your 1040 form and compare line by line the numbers on the form when you have the interest entered and when you don't.  So start by looking at your form 1040 (and either printing it - if you are using the desktop version or have already paid for the online version or writing all the numbers down) while you have the 1099-INT entered, then go back and delete the 1099-INT and compare the numbers.  This will tell you exactly what has changed. 

On the menu bar on the left that shows. 

1. Select Tax Tools 
2. On the drop-down select Tools 
3. On the pop-up menu 
4. Select View Tax Summary 
5. On the left sidebar, select Preview my 1040 
6. On the menu bar on the left that shows. 

1. Select Tax Tools 
2. On the drop-down select Tools 
3. On the Pop-Up menu select Delete a Form 
4. This will give you all of the forms in your return 
5. Scroll down to the form you want to delete 
6. Select the Form 
7. Click on Delete. 

Always use extreme caution when deleting information from your tax return.  There could be unintended consequences. 

To do this in the desktop program, you will just switch to forms mode.