Terminating an account in WHM is easy – and permanent. This can NOT be undone. If you want to shut down the account temporarily, suspend it instead – read the Suspending a cPanel/WHM Account guide.
Log in to WHM
Go to Account Functions
You can find this quickly by searching for "Account" in the search bar
Go to Terminate an Account
Identify the account you want to terminate
Choose if you want to retain the DNS zone or not
If you're sure you want to delete this account, click the Remove button permanently.
If you'd like to remove multiple accounts, click the checkbox next to each account you'd like to remove
Once you have selected all the accounts that you'd like to remove, click the Remove selected accounts button
Note: You'll have NO other warnings or options once you click the terminate button!