If you have a new e-mail address or wish to change your password, you can update this from the Settings section in Your Account.To change account settings:
If you change your e-mail address, all subscriptions and communications preferences will automatically be associated with your new e-mail address.
If you've forgotten your password, go to Reset Your Password.
Note: If you change the e-mail address on your account to an e-mail address that is already associated with another Amazon account, we will ask that you first verify your e-mail address. For more information, go to E-mail Account Verification.