hacking taxes

Hi Guys,

I am hoping you can help and am greatful already for you taking your time to read this and posting your response.

I want to do the following in woocommverce.

Say I’m selling a t-shirt for $99.
When a customer buys this within Australia (where our store is based) I want them to buy it for $99 and within the checkout it should display $99 (includes $9.00 of GST).
So far so good and I can get that to work BUT now I want all overseas buyers to also by the tshirt for the same price ($99) but because overseas people don’t get charged tax it should either say
$99.00 (includes $0 TAX) or it ideally just say $99.00.
SO in essence everybody aorund the world pays $99 for the t-shirt, however Australian residents can claim GST back.
Is this possible and if yes what do I need to do?

Thanks again!

PS I can get it to work so that Australian residents get this:
total: $99.00 (includes $9.00 GST) and for the rest of the world though it shows this total: $90.00 (includes 0.00 TAx). But this it not what I want ??