Well, this is a tax problem mixed with immigration. Be very careful what you are told and the accountability of those lay persons or professionals. I can see the response you received is very vague. You should engage a tax professional who is also a migration agent (or a migration lawyer, even better) for advice. I can only give you the migration lawyer take generally, but not as a tax lawyer or tax professional I hope this begins to illustrate the complexity of your question. Now, my basic understanding of tax is whether you are a tax resident., i.e., if you domicile in Australia or live more than 183 days in Australia. If you are, all income globally should be reportable. Where, whether or what your taxable income will be assessed to be may be different depending on the nature of your income. Then, your visa comes into play to apply the tax rate based on current tax rulings. As you can see, my answer may be very vague, and I would rely on written advice from responsible tax professionals.
