Despite the "solve" given to Gabi - it appears this is still an issue.  Someone posted in one of the other threads on this situation that "the instructions have changed for 2022" and this is the way it should be reported. 

I'm not sure if the reject issue is an IRS snafu, or an Intuit presentation snafu.  

I'm guessing, based the the reject  shown by the OP, that when all there is on 4a & 4b on the F 8960 (thus showing 'null'), that the IRS doesn't like that.  

Gonna' be fun finding out and waiting to get a 'fix'.