This tutorial assumes that you have already logged in to Plesk.
Now let's learn how to delete a hosting account from within Plesk.
Click the Domains icon.
Select the checkbox next to the account you wish to delete.
Then click the Remove link.
Since deleting a hosting account is a permanent action, that
also deletes all your web files, databases, emails accounts, etc., you
are asked to confirm the deletion.
Select the checkbox to confirm the removal.
Then click OK.
That's it! The account mytestdomain.com has been successfully deleted. Let's scroll down and check.
The account mytestdomain.com is not listed anymore.
This is the end of the tutorial. You now know how to delete an
existing account in Plesk. Remember that deleting an account is a
permanent action which will result in the loss of all data associated
with the account.