u/Financial-West-3920

The last time my taxes were filed was in 2022. For 2023 and 2024 I was a dependent under my parents but they haven't filed for those years. It's not going to get done anytime soon and I would like to apply for the dental benefits which the next application opens on June 2. I know I'm late for this year but how do I/ can I file without previous years info?

Also I worked in both the Ontario and Federal Elections last year how do I claim that?