You need to provide the required ones but not the recommended ones..only them if needed..like mine said proof of aussie wrk experience recommended but im not claiming points for that so not attaching any documents for that, u need to get medicals done at specific authorised clinics, you cant use your own gp...your Application starts once u pay the fee and best to upload everything when u can...if anything is missing when you are allocated a case officer they will let you know what is still outstanding and I think give you 28days to provided missing details...I dnt know any other amswers..good luck