You can change details about your address, phone and your account security questions and answers. Login to your account and click on 'Account' from the top menu. Click on 'Edit Profile' and change the relevant info.
Click on 'Update Profile' and you are done.
Note: Changing the account details will trigger our routine security checks and your account may be put on hold if we are unable to verify the new details. In such cases or if you need to change any other account detail, please contact our support team.