K1 Box 20Z has been entered but shows error at review

Entered all numbers but errors found during final review. Error message:

"Box 20 Code Z has been selected but no Section 199A income has been entered on Statement A."

 

I tried opening the form and found Statement A but where do I need to enter this number? I tried to ignor the error but I was not able to efile (already paid) before I fix this.

 

I have been filing K1 for years but this has never happened before. Please help!!! Thank you!!!