depends if online or in store. you should have a reciept or confirmation number to use on the website.
are you a customer, or employee? your wording makes me think you're wanting to track your performance, in which case you should speak to your supervisor or manager. if you are a customer trying to track (shipment of?) a purchase, then follow Jackie's advice. Use your receipt (paper, or email) to track your purchase's progress via the best buy website.
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