I have a K-1 that had the error on code Z, even though I entered all the Section 199A /Statement A information (I only had W-2 wages and UBIA). My K1 didn't have anything in Box 1 (no ordinary business income, only rental real estate activity). So I went into forms mode, found the K1, went to Section D1 "QBID-Statement A Information". It has all the Statement A information, like W-2 wages and UBIA. I entered "0" into Ordinary Business Income box and the error was gone.
