K1 foreign source for income on k1 Wks-Partnerships Additional Info

TT "Additional Info 1:Fgn Tax Code I Ln 2 col 3 is listed but no foreign source inc at ind level listed on K-1 add.info worksheet l Line 1." k1-1065, Box 16.
How to distinguish US source and Foreign source income? Sch k-1 worksheets  for Box 16 has codes: 
(1065 box 16 Foreign Transactions )
A  Other countries (not specified which)
B Gross income, all sources 
G Foreign gross income 
I Deductions allocated at indiv level, interest exp  
N Deductions, general cat 
P Total for tax pd
  
Code H is NOT shown on the K1. But TT finds an error if I don't list a foreign income source. Not a number, but only choices on TT are:
lump sum distribution, 901j income, Income resourced by treaty
I called the company with the K1, but they have no other information. The source is not listed on the k1.  What should I use?