The information in your account can be edited under the My Account settings (button in the upper right corner).
On “My Account” page, there is a box in the upper left corner called “User Details.” Click the blue “Edit” button in the box, and you can edit name, email, job title, company and phone. In the "Address Book," you can edit addresses by clicking the blue “edit” button under each listing. There is also a section called "Payment Methods," where you can add/remove payment methods.