I haven't played too much with the module, but I haven't had any issues so far. I originally started using your other module and made a couple updates myself, but have now gone back to the one you did because you had all the updates I put in.

GST has really been a sticking point for me for all my Australian projects. I think there does have to be an option to remove the GST from the shipping. I believe that AusPost does return the entire amount including GST. Luckily for the current project I'm working on, they don't want GST included in the price, so the tax system of Ubercart works fine, but for another project, I really have to figure out a good way of dealing with GST. How are you guys dealing with it? I am trying to come up with a module that allows the price in the database to be without tax so that it will work with any discount modules, etc. But, everywhere else the tax should show in the price, and then in the checkout, as a line item, it should just show the GST already included in the price. I keep getting stuck no matter what direction I look to get it to work. I am reaching a point where it looks like I'll have to go and almost completely copy parts of the current tax module into a new module to allow the tax to be calculated, but not actually added (again) to the price, but also be able to set using workflow ng when the tax should be shown or subtracted from the amount.

Anyway, any ideas, suggestions, etc?

Cheers,
Steph