Use the direct link to close your account. You have to enter your password and check the box to confirm.
URLS:
http://rememberthemilk.com
https://www.rememberthemilk.com/login/delete.rtm
Please note that AccountKiller.com is not associated with the business listed on this page. AccountKiller provides easy-to-understand instructions and guides on how to cancel charges and relationships from the list of businesses on our site, we have no affiliation with these businesses.