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To me it appears that Form 1065 Schedule K-3 would be issued by the partnership as an attachment to Form 1065 or possibly Schedule K-1.   The partner filing his own return would copy the information from the K-3 into Turbo Tax.  The information would come from the partnership.

Since none of my investment partnerships have included Schedule K-3, but all have checked box 16 form K-1, I don't know what it is best to do.   

My inclination is to uncheck box 16, knowing full well that at least one partnership likely paid foreign taxes.  Or I may just file an extension and file in October.  

Any other ideas?