Education

From IRS Form 8815, Line 14 "Excludable savings bond interest. Subtract line 13 from line 8. Enter the result here and on Schedule B (Form 1040), line 3" This value cannot be entered directly, because it must be a calculated total derived from your entries/totals on lines 13 and 8. 

Line 6 can only be entered following an entry on Line 5.

To navigate to the interview screens to enter this information, 

1. Select Federal Taxes > Wages & Income > I'll choose what I wok on
2. On the Income Summary, in the Interest and Dividends section, select Start/Revisit box next to Interest on 1099-INT
3. If you haven't entered any interest income yet you will see the screen, Did you receive any interest income?  Click the Yes box.
4. On the Choose your bank or brokerage screen, click on the I'll type it in myself box.
5. If you've already entered interest, you will see Here's the interest we have so far. Click Edit next to your entry for the bonds. 
   • [or Add interest income if the interest in the table is not the bond interest.]
6. On the next screen, Let's get your 1099-INT or brokerage statement details, click the box My form has info in more than just box 1 (this is uncommon).   
7. Enter the bond interest in box 3 and click Continue.
8. Continue answering questions through the interview screens to enter all necessary data for the form. 

TurboTax will automatically generate and populate the calculations on Form 8815 for you.