It appears Lacerte is properly limiting the Available NOL carryover to 80% of the post 2020 loss. To clear the Critical Diagnostic, enter -1 in NOL absorbed in 2022 if no NOL is applied against a gain in the current year.  That seems to remove the Critical Diagnostic.  Again, Lacerte is providing little assistance in this area and it's up to the community to work out the problem with their program.  A typical programmers making assumptions and users not being involved with the development of the program.