I was just testing on some of my sample returns and QBI is calculating on income from K-1's but its a bit different than the Schedule C.  

• On the K-1 S Corp the new 199A codes (Line 17 code V is the main one) need to have a value before the Qualified Business Income Deduction Info (Section D) is filled out. 
• For a K-1 Partnership, it would be line 20 code Z that would need to have a value for QBI to calculate on the Qualified Business Income Deduction Info (Section D).