I fixed mine this way.
1. Analyze your return reported code Z error.
2. Went to the form mode by clicking the "Forms" on the top right corner.
3. Go to section D, fill in the info from your K-1 statement. Now this is the real fix for my case, i have multiple K-1 has code Z.
TT has a very bad GUI, it puts 2 K-1s having issues in 2 tabs, very easy to miss.
I kept on fixing the 2nd one, TT is not closing the tab for the one just corrected, so i kept on trying and almost crash.
Until i suddenly found there's another tab and there's another error.
Filled in the info for the other one, this error went away.
