Before you can park a domain, you must have registered the domain. In addition, you must also point the domain to the same nameservers as your primary domain.
To add a parked domain to your account:
1. Log into cPanel.
2. In the Domains section, click the Parked Domains icon.
3. Under Create a New Parked Domain, enter the domain name you would like to park on top of your primary domain.
4. Click Add Domain.You have just added a parked domain.