Typically most e-commerce sites have one shared help page for returns policy, shipping details and terms and conditions. I have just seen the newly redesigned (again) ebuyer.com website and the help section gets in own drop down. They have broken down the help pages into 5 sections and then also a page for contacting them via a form, e-note and forums.

It allows your customer to get an answer  to their query without searching for it, and gives the customer another reason to carry on the buying process.