Sometimes the state-specific proforma items are actually relevant to the non-resident return. Lacerte does a surprisingly good job keeping track of state-specific passive loss carryforwards.

I keep an Excel file so I know what the state-specific items should be, and can correct them as needed. Most of the time, the corrections are for "-1 errors" - when there's actually a dollar of calculated loss and Lacerte interprets the result of the calculation as zero.