Best thing is to ensure when you check out, you give them your phone number and email address so they can " register your receipt". When you are ready to return simply go to the store with the product. They can look up your receipt if you lost it. Still have to follow return policy. Wala... done. 😀
Depends on what your trying to return. They due take some single items back. Best option is call ahead.
Thanks! Your answer is awaiting moderation.