1. Login to cPanel.
  2. Click the Addon Domains button in the Domains section.
    Domain Addons
  3. On the next page, you will see all your Addon domains listed. Click the Remove link beside the domain you want deleted.
    delete a domain from cPanel
  4. On the Addon Domain Removal screen you will see a message similar to this: "Are you sure you wish to permanently remove the addon domain “example.com”?" and "Remove the associated FTP account “example”." If you do not want to delete the FTP account associated with the domain, un-check the box. Click the Remove button to delete the domain from your cPanel.
    cPanel delete domain