Reni2

No - successful - response on this forum, neither an answer from the originator of the distribution. Removed the module Discount code and add the module Discount coupon, which has almost the same functionality.

Problem: The tax is computed before the deduction of the discount. Installed: osCommerce v2.2 Discount Code (updated to v2.9) - http://addons.oscommerce.com/info/7397/v,22 Order at Admin - Modules - Order Total: 1 - Sub Total 2 - Discount Code 3 - Tax 4 - Shipping 5 - Total Prices for the products in my shop are shown including tax. Example as it appears, with a discount of 10 euro: Sub-total: 50 (shown inclusive 19% tax) Discount: 10 VAT: 7.98 Shipping: 7.95 Total: 47.95 This should be: Sub-total: 50 (shown inclusive 19% tax) Discount: 10 VAT: 6.38 (Note: 50 minus 10 is 40. This, however, is including VAT, the net amount (excluding VAT) is (40 / 1.19 =) 33.61. The 19% tax on this amount is (33.61 * 0.19 =) 6.38) Shipping: 7.95 Total: 47.95 Can someone please explain how to configure osCommerce (or the php files) to get the desired result?