Your tracking number is emailed to you as soon as the order ships, which is normally towards the end of the business day. We try to ship all orders on the same day as they're placed, but in some cases it may take up to two days to ship, in accordance with our shipping policy.
If you can't find this email or believe it wasn't sent, you can also log-in to your account. Go to the My Account section and click on Order History. The most recent tracking information will be there.