Applications received at our Case Processing Centre (CPC) in Sydney, NS March 1, 2021 or later must use forms from October 2020 or later (indicated on the lower left corner of the form). Application forms that are not up-to-date will be returned as incomplete. IRCC does not consider the date of signatures or mailing to be deciding factors.
If you are not sure whether you have Canadian citizenship or not, see if you may already be a citizen.