Most businesses have unique shipping needs that are based on a variety of factors and limitations. Once the Merchant has decided which methods (and/or carriers) to offer, the only thing shoppers need to do is choose a method when they place their orders. As part of the third-party fulfillment setup process a mapping must be created from each available shipping description offered in the e-commerce system to the unique shipping code used by the fulfillment center.
To compile a list of the Shipping Methods available use the following guide:
Login to your Magento administration panel
Click System > Configuration.
Under the Configuration > Sales heading, click Shipping Methods.
For each type of of shipping method enabled use the following guide:
Flat Rate / Table Rates / Free Shipping
UPS / FedEx / USPS / DHL