To become eligible for Canadian citizenship, you must be a Canadian PR holder and must have lived for 3 out of 5 years (1095 days), filed taxes if required, demonstrate language proficiency (either English or French), and pass a citizenship test that covers Canadian history, values, institutions, and symbols. The IRCC (Immigration, Refugees and Citizenship Canada) will conduct a thorough background check to ensure the applicant meets all the eligibility requirements and is free of any criminal record.