box 20 entries are not sufficient. there is a separate section for the k-1 where this info must be entered.
code z can be up to 3 items and is apparently a separate statement.
1) 199A/QBI income
2) wages
3) UBIA or unadjusted basis (in qualified property) immediately after acquisition.
in my case, the statement for 20Z was on the backside of the k-1 but could be a separate piece of paper.
