I am a student. If I want to do the tax service for last year 2022 first, for my mailing address, should I type my address last year or my current address?

You would use your current address for your contact information.

This Canada Revenue Agency (CRA) page tells you all the ways you can update the address they have on file for you: https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/change-your-address.html

Thank you so much!