You can access and edit your account settings through the MY ACCOUNT button at the top-left of the web site pages once you're logged in, or follow this link.
Use the tabs to see Subscriptions info, access PDF articles you've bought (Downloads), readers' ads you have submitted (My Ads) or check your Order history (download PDF Invoice receipts here).
Address / Email / Password changes
The Edit tab is where you can modify your postal Address (used for print magazine delivery), Email (used for Web site and Web subscriptions, and Mailing Lists) as well as change your site login Password.
Usernames can only be changed by SOS staff, and you need to submit a dedicated form to achieve this. See here: Username Change Request