If you are a Canadian citizen....why is your son not a citizen....please could you help to explain.
Are you a naturalized Canadian citizen.....i.e., was a PR before you became a citizen....if yes.....did you declare your son as a non-accompanying dependent in your application for PR before becoming a citizen.
If IRCC was initially informed that you had a son....you may sponsor your son as a dependent child if he qualifies as a dependent child.
I am a naturalized Canadian citizen, yes I declared him as an unaccompanied child,. He is 14 years old.