UK VAT Aware Shipping module for the WP e-commerce system. Calculates proportional shipping on mixed VATable items.
Originally this plugin was developed for a customer with specific requirement to show the extra VAT on shipping separately but this requires a number of other changes in the WP e-commerce templates. I decided to make this an option so that more people could benefit from the correct tax calculation whether or not they need this additional capability. If you need to show separate amounts then you will need to make a number of code changes where VAT is displayed (PayPal, Account summary, payment summary etc). This is not for the faint hearted.
See the above FAQ. The default is to show the extra tax directly in the total so that you do not need to make other code changes to the plugin. If you need to show tax separately then you will need to make supporting changes to your account summary, payment gateways etc which is outside the scope of this plugin.
Refer to the screenshot example of the checkout screen
In the screenshot example the total of the basket is 74.99
VAT is due on the CD but not the book so the proportion of VAT on shipping is 55.00/74.99
Shipping in this case is to the UK and 8.95 for the combined weight of these items
So total shipping cost including VAT is 8.95 + 8.95 * .2 * (55/74.99) = 10.26
If you have used the option to store VAT in PnP then the plugin adds the additional VAT as an additional shipping amount. In this case you will need to allow for this when sending information to PayPal and make code adjustments as appropriate (outside the scope of my support)
If possible a future version of the plugin will filter the calculated tax total to remove this problem.