My document checklist is as follows:
# Application Form(s)
- IMM 5710
# Supporting documents
- Passport
- Digital photo
# Optional documents
- IMM 5275
- Client Information
It says nothing about IMM 5707, yet the instructions linked in my first post mention it explicitly.
"In the Family Information form (IMM 5707) part of the document checklist, upload..."
Maybe I didn't navigate to the proper document checklist. In that cas I guess I need help with what answers to put into the questionnaire.