"Log in. In the "domains menu" click on "Transfer domain to us". Type domain name you want to transfer, select your transfer options, and click Next. Supply authorization keys and click "next". Click "submit order".
There are also tasks you must complete at your former registrar:
Make sure the Registrant and Administrative email addresses are correct
(unless you are transferring from Go Daddy, in which case you should
only make changes to the Administrative contact),
Unlock the domain
name.
Retrieve the EPP key (needed for submitting domain transfer order)
Respond to transfer confirmation emails.