Please refer to our video tutorial: Logging into cPanel.
You can access cPanel at any of the following URLs:
http://yourdomain.tld/cPanel/
http://yourdomain.tld:2082/
http://yourip/cPanel/
http://yourip:2082/
Example: If your domain was www.example.com you may access cPanel from http://www.example.com/cPanel
When prompted, enter your cPanel username and password (supplied in your hosting account welcome email). Click the "OK" button.
Congratulations! You now know how to log in to cPanel.