First you will need to access the WHM.
You can access the WHM on the server using
http://my-domain-name-here.com/whm after propagation
Please wait for the server to create the complete account. You should not hit the "STOP" button on the browser until the process is complete.
You will receive the account information on the right hand frame of the browser. The process will be complete on display of the account creation result.
Save the account information for further use. Incase you have resold the account, it will be helpful in sending the account info to your new client.