1041 K-1 worksheet

On the 1041-k1 worksheet for the beneficiarie's 1040 tax return, for foreign tax credit, box 14, line 5a asked for US source and foreign source income. On line 7 it asks for gross income from all sources. It is all passive income. I can't file my taxes because when I add the US sourced gross income and foreign income, it says it has to add up to less than the gross income from all sources. Well, it does add up to less. Maybe I don't understand what is meant by gross income from all sources? Or US source vs foreign source income? There is absolutely no information about this on the K-1.

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