You can delete the add-on domains and sub-domains from the cPanel.

Add-On Domain:

1. Login to the cPanel account.
2. Go to the add-on domains.
   
   
   
3. Under the Modify Add-on Domains, You can remove the Domain. Click on Remove Button.
   
4. You will be asked for confirmation to remove the Add-on domains. Click on "Remove".
   

Sub-Domain:

In the similar way, you can remove the sub-domain as well.

1. Go to the sub-domains from the Domains Secsion.
   
2. Click the Remove Button for the Sub-domain which you want to remove.
   
3. It will ask you to delete it permanently. Click On Delete Sub-Domain.
   

Note:

• You can not delete the Main Domain from your cPanel account. If you want to change the Main Domain, please contact our Support Team.
• You can not remove an Add-on domain, if any sub-domain/parked domain pointing to the add-on domain. You have to remove the associated sub domain / park domain first.
• It will remove the domains/subdomains only. The web files/data will not be removed by the system. You can remove the data from the File Manager.