Good Day Immasoulkeys!
The easiest way to delete your Yahoo Mail account is to go to https://edit.yahoo.com/config/delete_user
First, you will be asked to sign in using your Yahoo I.D. and password.
Then, "Terminating your Yahoo! Account" page will appear, You have to confirm your password and type it in the box.
Next, copy the code shown and type it in the small box before pressing the "YES Terminate this Account" button.
You must be aware that if you delete your account, you could lose all services belonging to the Yahoo products like your Yahoo!
GeoCities page, your My Yahoo! settings, your Hotjobs profile and other
data in services belonging to the Yahoo!
And if you are paying for any subscription services using your Yahoo Mail account, it is better to cancel all of them before terminating your Yahoo Mail account.
Approximately, 90 days will be given to any terminated Yahoo Mail account before it is completely deleted from the Yahoo users database.