Hi,
You don't need to create a tax zone. All zones are considered as taxable.
You also don't need to change the "default address type" of the configuration. The default value "individual" is recommended.
Other than that it seems properly configured.
Once you enter your address during the checkout, it's the address's state and country which are taken into account for the taxes and since you limited the tax to australia, if your address's country is not australia, the tax won't be applied. Maybe that could be the problem ?
We have a list of possibilities for the cases where taxes are not working in that FAQ :
www.hikashop.com/support/documentation/i...ion-listing.html#faq
Please check that everything on that list is ok.