We are looking to change our shipping costs in the store from a flat rate to the UPS Rates & Service Selection. Is this a good choice to resolve a problem we had of finding a way to accurately charge shipping for a bulky item? I believe we are already signed up for the UPS online tools, if so where do I go to enter the product weights/shipping dimensions so that to give the customer an accurate shipping rate and use the "tool" correctly.
You can set up the shipping weights in the product detail screen for each product. You can also set up shipping & box preferences in OMS/Settings/Edit Compatible Software/Online Shipping Tools Preferences.