An account is not required to make purchases. If you choose, however, an account may be set up any time before or at checkout.
Simply click the LOGIN link at the top right of any page, click the CREATE AN ACCOUNT link below the LOGIN button, and follow the instructions.
Once you've created an account, you can view any of your past purchases and/or account information after you log in. If you need to edit, change, or add an address, simply click the VIEW YOUR ADDRESSES button at the bottom right of your account page, select whichever action you require, and follow the instructions. To log out, simply select the LOG OUT link in the upper right of any page.