I've currently setup a coupon code that when entered gives 10% on everything in the shopping cart.
This works fine, my issue though is that Tax is calculated wrong. Currently tax is calculated purely based on the [subtotal]
If discount is applied I need tax to be calculated based on: [subtotal] - [discount] = [amount_to_base_tax_calculation_on] * [tax_rate] = Correct tax
Is there any settings / options ive missed to make the checkout page do this?