Yes, Statement A is required when Box 20, Code Z is reported. It should have been included with your Schedule K-1. Try using these steps for this question for Schedule K-1 Box 20 Code Z needing Statement A.
For more details, see TurboTax Expert DavidS127 notes regarding inputting details for Box 20 Code Z:
Continue through the K-1 interview after you have entered your value for box 20 code Z.
Enter the code Z when you enter the K-1, but you don't need to enter an amount.
Continue on, and there is a screen near the end of the interview titled "We need some more information about your 199A income or loss".
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