QBI in MLPs and Turbotax

I’m wondering something about QBI income for PTPs.  I’ve noticed that the QBI amount shown in item 20Z on some of my K-1s doesn’t always equal the total PTP income (ordinary business income, net rental income, other income, 1231 income, etc.).  I don’t entirely understand this.  Specifically, Turbotax asks for these items below.

QBI screen.PNG

 

I don’t usually get a Statement A, so I’ve been just entering the numbers shown on the regular K-1 for these items.  But when these don’t total to the 20Z amount, should I be doing this?  If not, what should I enter on this screen?

 

For example, in one MLP I own, I have just $50 of Section 199A PTP Income, but $447 in ordinary business income and $217 in 1231 gain.  I don’t know what accounts for the discrepancy.  Would entering $447 and $217 in the fields above be incorrect?  I have no further breakdown of what constitutes the $50 20Z item.

 

Thanks for any help, especially @nexchap and @Mike9241.