Log in to your GoDaddy account.
Within My product tab (1). Under domain (2) section. you can find your domain name (3) there. find your hosting plan (4) then click the manage (5) button.
Click cPanel Admin button
Click Addon Domains button
Input your domain name under ‘New Domain Name’, Leave all the others as the picture show above.
After that you can click the file manager link to make sure there is a folder created for your web site. for my case, It will has a new folder under ‘public_html’ and named as ‘easycomputerott.com’.
The next step will be install WordPress for your new website. You can find detail step by step within ‘WordPress’ categories of our web site.