What I was trying to convey is that there is no requirement to display or mention the GST component (other than in a tax invoice), which is why Australian retailers can display just the price (so long as it includes GST).
Storez is setup to calculate and display VAT/GST etc at checkout and is careful to point out where tax is not yet displayed. AFAIK, this is acceptable internationally, specifically the US and EU.
Technically, Storez is in breach of the Fair Trading Act in Australia
- an Australian site selling only to non-residents can display GST exclusive prices but must state that the price doesn't include GST.
- an Australian site selling to residents and non-residents can also display GST exclusive prices but is required to additionally display either the GST inclusive price or the GST amount for residents.
The simplest way to handle that would be to check against the country provided in storez configuration and then display something like "excludes GST of $x" in all areas where a price is indicated.
Then the checkout proceeds as it does now.
Regrettably, I have converted Storez to meet DF10 requirements, so I'm not inclined to working on both atm.