Not to worry, your eTA is valid for 12 months (or until your passport expires, whichever comes first) once it has been approved. As long as you can enter into Australia before that expiry date, you’ll be able to visit.

If your eTA is expired however, and you’d like to enter Australia after the expiry date, you’ll need to apply for another one. Feel free to create a support ticket here and we’ll help you figure out your next steps.