Business & farm
Gross Income Sourced at Beneficiary Level: US Sourced Income doesn't necessarily mean Box 2a plus Box 14 Code A.
The screen below generates because you've entered the foreign tax credit from K-1 Box 14 Code B on a previous screen. Because of the inclusion of foreign tax credit, the program realizes that the K-1 must have some foreign income. What it's trying to get at is a breakdown of U.S. Source Income vs. Foreign Source Income.
The amount entered in Gross Income Sourced at Beneficiary Level would equal the sum of Gross Income Sourced at Beneficiary Level: U.S. Source Income and Gross Income Sourced at Beneficiary Level: Foreign Source Income.
Gross income would include your tax-exempt interest, presumably in the U.S. Source Income category, and you're correct that you'd enter Box 2a as opposed to Box 2b, but which Source Income box it would go into depends on where it came from.
