Please follow the below instruction for how to create new address if you wish your billing address is different with shipping address:

1.My Account-Address Book-Click Add New Address (The default billing address is the same with shipping address).

Address ScreenShOT


2.Fill in your address information and select what the new address is used as ,then click save address.

Address ScreenShot-2

3.Now you have two different addresses for billing and shipping