Magento Tax Calculation with Coupon Code

Question

If no coupon code is added the calculation of the tax and end price is fine. But if i add a coupon code (fixed price 10€ on basket total) the calculation of the tax is not correct and the basket total also. For better understanding what i meed i made screenshots.

Any Help is very appreciated!

Answer 1

Look under System > Configuration > Tax

Under Calculation Settings, you can set when the tax is applied; either Before Discount or After Discount