Question

How do I delete my account?

Answer 1

Press "permanetly delete my account"

Answer 2

1. Click on the "My Account" button in the upper right portion of the screen.
2. Click on the "Permanetly close my account" button near the middle of the screen.

Note that if you have already shared this family tree with anyone else, it will not actually delete the tree, so the other person/people can still see it, and edit it if you gave them edit rights.