The "Australian government" which is a private "American company" isn't what people think it is.

So ask them what is the geographical jurisdiction of Australia and if registered in another land mass location then all their laws apply to that location
INCOME TAX ASSESSMENT ACT 1997 - SECT 960.505
Meaning of Australia
Territories
(1) Australia , when used in a geographical sense, includes each of the following:
(a) Norfolk Island;
(b) the Coral Sea Islands Territory;
(c) the Territory of Ashmore and Cartier Islands;
(d) the Territory of Christmas Island;
(e) the Territory of Cocos (Keeling) Islands;
(f) the Territory of Heard Island and the McDonald Islands.
Also look up INCOME TAX ASSESSMENT ACT 1997 – SECT 4.1 tax assessment could be nil
Ask them what is the geographical jurisdiction of Australia and if registered in another land mass location then all their laws apply to that location
INCOME TAX ASSESSMENT ACT 1997 - SECT 960.505
Meaning of Australia
Territories
(1) Australia , when used in a geographical sense, includes each of the following:
(a) Norfolk Island;
(b) the Coral Sea Islands Territory;
(c) the Territory of Ashmore and Cartier Islands;
(d) the Territory of Christmas Island;
(e) the Territory of Cocos (Keeling) Islands;
(f) the Territory of Heard Island and the McDonald Islands.
Also look up INCOME TAX ASSESSMENT ACT 1997 – SECT 4.1 tax assessment could be nil.