Nobody knows what to do? Read the replies in this thread, including the reply marked "Best Answer":
From "Known Issues" on the IRS Website (emphasis added):
"Business Rules F8960-019-04 and F8960-003 may cause returns to erroneously reject. These business rules need to be modified to reflect the updates to the Instructions for Form 8960 (Tax Year 2022) regarding the Specific Instructions for Line 4a to include Schedule C (Form 1040) amounts reported on Schedule 1 (Form 1040), line 3 and Form 1041, line 3. [...] Projected Resolution Date: 2/5/23"
Is your error "F8960-019-04"? Then it appears that the IRS is the problem...
