@AmyC The calculation is as follows: 450 - (200 * 50%) = 450 - 100 = 350
You may refer to the form 8815 Smart Worksheet to understand the calculation.
In addition to col a, col b, line 2 and line 3, there is a Smart Sheet to Calculate Interest on Line 6. Line A in this Smart Worksheet is the Face Value of EE Bonds which is $200 (see the example above).
Based on this information, Line G is calculated as $350 which is carried to Line 6 and finally to Line 14.
