But the discount is applied to the whole order and an order might contain products at different VAT rates, I can't see a place where you can define the actual VAT rate to use. Actually I have just checked this out in the product and the default VAT rate offered is custom so presumably you just work it out and enter a custom rate is you have more than one rate. For me this means that to get hold of the VAT charge on the discount I have to go to the order details table find the line and then save the tax amount charged UNLESS it is stored in the order table somewhere - I'm rambling, here is a more direct question.
Is the tax rate that has been used for an adjustment stored in the order details table?
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