Displaying prices including sales tax based on currency or browser location identifie

[Liamv]

At present if you browse our web site (without logging in) it defaults to displaying prices including sales tax for customers in New Zealand based on the tax rate we have set in Admin>Location/Taxes >tax rates>New Zealand

We have a different tax rate set for Australian customers in Admin>Location/Taxes >tax rates>Australia (which we have set to 0%)

Some questions:

When I look at our web site from within New Zealand, I see that it defaults to displaying prices including the New Zealand tax rate?

How do I get it to default to displaying prices including the Australian tax rate for Australian custoerms?

[DrByte]

It doesn't know how to calculate taxes until the customer logs in and supplies their address.
Until that happens it assumes the customer is in the same zone as the store, and applies those tax rules.