I have the same issue. I found instructions for how to resolve line 20 code z but I also have line 20 code AG which does not seem to be the same since it is gross receipts for 3 different years. There are code AG 8990 gross receipts for year 2109 $xxx; cod AG 8990 gross receipts for year 2018 $xxx and code AG 8990 Gross receipts for year 2019 $xxx. It is the ENTRY into turbo tax that needs to be explained.
Julie
