I have an OSCommerce based website with discount coupon add-on installed from OSC contributions. I also use table based shipping and the combination of the two is causing a problem for me. If your coupon being entered changes the price so you go to a different shipping rate then you get stuck in a look between checkout_shipping and checkout_payment. You continuously receive an error saying that your shipping rate has changed and it redirects you to checkout_shipping instead of checkout_process.
In correcting this problem I would like the checkout coupon entry to be moved to the shopping_cart page. I would like the Total box also displayed on this page so that the user can see what everything will cost them. Then should be able to enter a coupon and hit apply and then have the price reflected in the Total box on this page. From here they can chose to checkout and pick a payment method.
I am happy to provide whatever other information is needed.
Need OSC expert.