Access your Account Settings by clicking the dropdown arrow next to your avatar in the top-right of your screen (arrow 1) and selecting Account Settings (arrow 2).
Account Settings provides you with a list of options to both manage and enhance your account, including but not limited to:
Managing your subscription status
Upgrading your plan
Adjusting payment details
Adjusting notification settings
Managing privacy settings
For additional assistance with managing your account, please contact us at help@teamtreehouse.com.