Thanks much for your help.

Let me see if I understand. The tax options for the Shipping will take the shipping cost from the AP server and subtract the amount for tax. Hence the business will pay the tax gap on the postage with the intention on claiming it back at tax time.

Whats to stop make the customers pay the full shipping amount and then the business not dealing with the GST from postage costs. Even if they did claim the 10% it would be a bonus that was factored into the shipping.

Just clearing my head on that one. Tax is not my thing.

YES! the test data is wack. Hence why I am so confused. It dosen;t make sence to be grams or kilograms. This is why I am so confused. And why I have been doing this style of testing to figure it out.

I am only purchasing one product, no handling fees, the default dimensions have been set plus I added them to the product for testing, all tare weights are set to 0 and there are no tax rules.

What you say makes sence why it jumps from 4.20 to 8.40 and skips all inbetween amounts, but I have always only purchased one item.

I wasn't going to crunch the code for find bugs but to trace why the test data is so confusing and why the weight values do not add up. I know it something with my system Im just at a lost to find out.

What kind of links are you looking for. The site is www.rocciopals.com
I have only been testing Parcel Post the others have handling fees on top of them.