Find out if you need to file your taxes.may need to file personal income taxes for at least 3 years within the 5-year period.must have been physically present in Canada for at least 1,095 days in the 5 years immediately before you apply.must be a permanent resident (landed immigrant) of Canada.must be 18 years of age or older on the day you sign the application.To be eligible for Canadian citizenship, you: This form for an application under subsection 5(1) is intended primarily for permanent residents aged 18 and over who want to apply for Canadian citizenship.