Investors & landlords

For a partnership K-1 submission, I entered code Z and no number on Line 20 of the K-1. When I get the message to correct two (2) for 199A, I tried entering "0", "1", "-1" and other larger numbers. I also entered matching numbers in the Schedule A, line1b.  But I continue to get the message stating I should make the appropriate entry in the Schedule A.

 

How do I resolve this as the last entries I need to correct to complete the return?