GST - Categories/Providers configured but still shows zero

Hi I have GST set up for Australia.

All my product prices include GST

I've applied it to categories and have the by country state and zip set up to apply 10% across the board for Australia.

Whenever an order comes in there is always zero GST and in the cart breakdown GST is marked as zero??

Shouldn't it at least calculate the GST component and show it for tax purposes for invoices and against the order?

I can't seem to configure it..

You also need to select the tax category for each product, did you do that?

I did and in the end had to manually update the taxrate column in the orders table also.for older orders to show up the tax and tax amount..

Thanks for your help!