On the Your Account page on the Amazon Payments website, you can do all of the following:
To log in to your Amazon Payments account and make changes, go to https://payments.amazon.com/, log in to your account, and then click the Edit My Account Settings tab.
Changes to the following information can only be completed on Amazon.com, rather than on the Amazon Payments website:
To change any of the information on your Amazon.com Your Account page, go to http://www.amazon.com, and click Your Account at the top of the page.
Note: If you would like to change the email address that is associated with your Amazon Payments Account, you will need to log in to Amazon Payments to complete the change. If you previously verified your email address, you will need to complete the verification process on Amazon Payments again. We'll send an email to the new address that you provide. Click the unique URL in the email and then log in with your password to complete the verification process.