There is a lot of confusion around what happens regarding paying taxes once you leave the country and have no plans to return.
The simple answer if you must pay taxes for the financial year that you are in the country, you must also let the ATO know that you are leaving the country and no longer need to lodge Tax Returns etc.
If you are registered for an ABN/GST, you must let the ATO know that you wish to cancel these registrations from the day that you are leaving the country.
Please don't hesitate to contact us for further clarification on this topic.