I suggest the best way is to uncheck box 16. That is what I did and it works fine. I was assured by a CPA that this would be fine knowing that the K-3 is specific to US $ and no foreign income. So not to worry, uncheck the box 16.
I had trouble with TT saving the data so I had to delete the form for the K-1 and reenter the information again and NOT checking box 16.
Good luck!
