go to your account, select a domain and click the push button
then....
Step 1: Enter the Account Number you wish to push domains to.
Step 2: Enter the Current Authorization Code from the account your pushing into. The Current Authorization Code should be sent to you by the receiving account holder. They can find it under My Account, Security Settings in the blue menu bar.
Step 3: Enter your account password for security purposes.
Step 4: Select the contact settings to use for the domains being pushed (your settings or the receiving account settings).
Step 5: Select Email Confirmation and Notification.