When you terminate your account, you permanently lose all saved data and Yahoo site access associated with your ID. You’ll be deleting your email account, address book, group memberships, Y!Answers account, Y!Messenger ID, any photos you’ve uploaded, any 360 blogs you’ve posted, etc. If you’re sure you want to delete your account, click on this link: https://edit.yahoo.com/config/delete_use… Yahoo will ask you to enter your password one last time and then you will click on the “Yes, terminate this account” button. Your entire account will then be completely & irretrievably deleted.
First, make very sure that is what you want to do, if you delete the account you can never get it back, or use that ID name, either. Any other yahoo programs associated with your mail account will also be deleted. If you are sure: Click on the help at the upper right corner of the screen from the account you want to delete.