Good question, I have the same one.  I was thinking of going to the "NY Decoupling Adjustments" and overriding the "Recomputed Federal Adjusted Gross Income" Federal amount.  It gets me the correct answer but doesn't really tell the story of adding back the Unemployment.

I can't find any guidance on this either.  Hopefully someone will see the correct way to handle this.  

Note I still get a critical error about NY adjustments related to non-taxable unemployment comp allowed under the ARPlan are currently under development.  Verify accuracy of the return and make state adjustments if necessary before filing: