I count two entities - one filing as a 1040 and another filing as an 1120S.

Right.  So does that mean a setup for the individual and a second setup for the entity?  

I don't do ProConnect so I'm not sure what you mean by setup.  If that means creating one 1040 return and one 1120S, then yes.

No, that's not what I meant but I appreciate you answering

AFAIK there is no such thing as Organizers for S Corps. Your client should be providing you with a trial balance. 🤣

The organizer includes the engagement letter so yes there is

@kimmonzo 

Lacerte (PTO's big sister) doesn't have organizers for Partnerships or Corps (S or C).  Organizers are available only for individuals & trusts.   YMMV, but I doubt organizers exist for entities that, generally, use double entry accounting to maintain the books.

Engagement letters can be generated outside of organizers.  Most E&O insurance companies provide templates - perhaps your insurance provider does too.

@kimmonzo 

I generate organizers for my entity clients using the 'client letter' function.  You 'do' have to develop the wording yourself (at least in Lacerte).   And the letters are generated FROM the S-Corp or Partnership module.