WHM → Account Functions → Create a New Account.
- Enter the domain, a username, a strong password and the client's contact email.
- Choose the package (plan) - this sets the disk, bandwidth and feature limits.
- Pick the cPanel theme and leave the rest at defaults, then Create.
WHM creates the account, DNS zone, mail records and document root. Send the client the login URL https://their-domain.com:2083 with their username and password.