Need For Fix The Way Drupal Commerce_Coupon
The latest rc of drupal commerce_coupon is acting weird when using a vat on products when using fixed amount and percentage amount values on a Product discount.
Right now the calculated VAT is too high.
- Just list the coupon discount value in the totals.
- Remove it from the line items.
- Make the vat calculation correct again.
- There is a small bug when disabling coupon codes which needs to be looked into.