Be logged in. Go to Account Settings. Bottom of the Settings page: click the link to delete your account. Follow the steps.
URLS:
http://www.trello.com
https://trello.com/
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.