The form for an individual person asks you basic information, marital status, employment, education and mode of transport. If someone is absent, say on holiday, but really lives at the address the form must also be filled out for them. For minors or people not competent to enter into legal acts, the forms will be filled in by their legal guardians, e.g. parents and carers. Same sex couples are recognized. Ethnicity and religious beliefs are included as questions but filling them out is optional. And yes, if you want to write Jedi, you can.