We have a dependant on Application so i put 3.
it didnt allow me to put just a space in city of birth so I type it in.
First go through attached pdf in AOR sent to PA.
1. PA need to Log in with GCKey account
2. Permanent Residence - Family Class (Spouses)
3. Application Number and Last Name - PA
4. City of Birth - PA
5. Country of Birth - PA
6. Passport Details - PA
7. Provide details as per form - Province, City and marital status and put '3' as the number of members in the application in your case
8. Click on the 'Search for my application' tab
9. Then on 'Link my application' tab
hope that works.