Yes, BLS wants a self declaration from anyone who are not employed. I was surprised by this requirementHi do they need letter for housewife also??? Do we have to upload also?? Please let me know..

If the adult is a student, they need a copy of the student ID.
FYI - When i submitted my OCI in BLS Mississauga, they showed a customized checklist sheet which need to be submitted.
If you have any OCI holders in your family, get those copies as well.
Plus the copy of this checklist sheet - it did not make sense to me at all. It is basically an instruction sheet but they just need to make money.
https://www.blsindia-canada.com/tor...usly-Indian-Citizens-Toronto-Jurisdiction.pdf
To upload, you can do that to any of the sections and does not need to a relevant. you can combine multiple documents together under a section as long as the size is less than 1 MB.
Hope this helps and good luck.