A few months ago I decided that I am gradually going to move away all my registered domains from bulkregister.com to godaddy.com.
Now each time I transfer a domain I am faced with the question of where the hell did they place the authorization code.
so as a service to myself and anyone who might be looking for the same:
1. Log in
2. On the main(gray) toolbar near the top, hover over "Domains" and in the sub menu that opens click "My Domains".
3. Click the name of the domain that you are transferring.
4. The third Setting is "Authorization Info / EPP Key" click the link next to it that says "Email Auth Code to Registrant" and it should reach you inbox.
good luck.