Can my friend mail my tax file? Because I already moved out from Canada, I cannot netfile online. Or should I mail my file from outside of Canada?

Troubleshooting

Yes, you can get your friend to mail your return or you can send it by fax. You can find the address (or fax number) to send it to here: https://www.canada.ca/en/revenue-agency/corporate/contact-information/where-mail-your-paper-t1-retur...