Hi,

I have set up as follows
Brand new site, clean install, latest version of Zen Cart running on windows server with php Version 5.1.1

Zone Definition - Australia
Tax Rate - 10%
Tax Class- GST

Default and only currency is AUD (Aussie $) and I have updated the currencies in the Localization > currencies as well as updating the english.php to set the default currency to true. There are no other currencies set in the site, the only one there is AUD which is set to the value of 1.00000000

Config > My Store
Country - Australia
Zone - Northern Territory
Display Prices with Tax - true
Display Prices with Tax in Admin - true
Basis of Product Tax - Shipping
Basis of Shipping Tax - Shipping
Sales Tax Display Status - 1

If I add a product for say $110.00 gross the nett calculates properly at 100.00, but when I go to view the product in Admin before adding (or updating) the price there is the 100.00 (nett price) and that is the one that also shows in the shop front.

At the moment I only have put in one product - I want to get this right before I merrily add products!

Could somone point me in the right direction as it is obvous I am missing something!