The simplest way to “skip to the end of a form” is put all (subsequent) optional questions in a group, and make that group irrelevant; eg by having a question somewhere “Do you wish to continue Y/N?” and having the group relevant = ${response} != 'N'
If you wish to skip different things in multiple places, then you may need to expand the scope of your optional group(s) relevance expression; eg relevant = ${response1} != 'N' and ${response2} != 'N'
