Updating your account details is very easy. Simply log in to your TerraCycle account, click on the icon in the top right corner and choose "Edit my details" from the drop down menu.
Alternatively, you can choose "Profile" from the drop down menu, and on the left of your Profile page under the "Account information" heading, select "Basic information", then "Edit your profile". Please remember to click save before you leave the page.
Please contact customer support if you are having any issues.