You just have to apply for your wife if your child has canadian passport.
Use the new ircc portal sign up on it. Its easy and user-friendly. Don't have to separately fill out forms and upload.
Upload all the required docs According to your situation.
Like PA-wife passport, nikkah namma, FrC, bank statements of PA and/or sponsor, health insurance for your wife if you can buy for the duration of her stay,
Job letter of PA if not working use yours job letter, your invitation letter and your wife brief sop/ plan.
Hope it helps
[/QUOTE and do I need return air ticket to show in my TRV application for my son and wife