To edit your shipping address:
Go to the account page
Enter your registered email address - this is the email you used when creating your subscription
Click Continue
You'll receive a one-time verification code via email
Enter the code on the login screen
Select the Edit button next to your shipping information
To edit your billing address:
Go to the account page
Enter your registered email address - this is the email you used when creating your subscription
Click Continue
You'll receive a one-time verification code via email
Enter the code on the login screen
Select the Edit button next to your billing information