I want to give 15% discount on shipping rate that I get from ups in magento.any idea ?
We use an extension provided by Amasty that allows this. You can set it to work for all orders, or orders to certain destinations or orders totaling over a certain amount...
This is the link to the extension http://amasty.com/shipping-rules.html
And on magento Connect: http://www.magentocommerce.com/magento-connect/shipping-rules-by-amasty.html
I am not affiliated with the developer nor do I receive any benefits from recommending their extensions