Get your taxes done using TurboTax

When entering Schedule K-1 (1065) in TurboTax Home & Business, after you check Box 16, for look for the page "Enter info from your Schedule K-3." 

Under Foreign Country or US Possession, the drop-down box includes "XX" after Zimbabwe. 

"Various" appears near the top of the list after 951A. 

Either of these two choices can be used for sources that are not on the list.

Your other option is to use Forms Mode to open the K-1 Partner form for this partnership and use the drop-down at the beginning of the Foreign Transactions Smart Worksheet under Box 16.

For Schedule K-1 (1120-S), only "Various" is available in the drop-down, again appearing under 951A.

See attached screenshot.