Filing Taxes 2025 Canada Online. Below, i’ll review this upcoming year’s tax filing deadlines, late penalties, and key changes to keep in mind as you approach the 2025 tax deadline. Understanding these deadlines can help avoid penalties and ensure.

You can electronically file your 2017, 2018, 2019, 2020, 2021, 2022, and 2023. The netfile and refile services are now closed for the electronic filing of your initial and amended t1 personal income tax and benefit return.