There is no specific page break. I have fiddled with mine (and shortened it) by adding hard returns on page 1 to force a heading to page 2. I only have a 2 page questionnaire. 

I use 2 side - Letter/engagement - question page 1/2 - that ever comes after. The letter address fits my envelope, so no slip sheet. 

I printed several times to pdf BEFORE committing to paper. I am still only in the planning phase and I do not trust that all is well with 2019 organizer/proforma yet. New update today, but there are still reports of unrest among the troops.