TT "Additional Info 1:Fgn Tax Code I Ln 2 col 3 is listed by no foreign source inc at ind level isted on K-1 add.info worksheet l Line 1." k1-1065, (16 -A B C F I M P)

How to distinguish US source and Foreign source income Sch k-1 worksheets  for Box 16 with codes:  

S 1065 box 16 Foreign Transactions A:Various; B 474 Gross income all sources; C 0  Gross income form all sources; F 85 Passive Category;  I 16 Interest Expense;  M104 Passive category; P 2 Total Foreign Taxes paid.