According to the Developer Guide PDF dated 2012-06-13, after the status of our application is “Waiting for Upload,” we are to use Application Loader to upload our binary. However, the Product > Archive and submit process through Organizer still works. This process through Archive is way easier and faster than the App Loader process. But here is the App Loader procedures to follow if you want to take those steps.
Here are the Application Loader instructions online: https://itunesconnect.apple.com/docs/UsingApplicationLoader.pdf
“Waiting for Upload” status
Make sure in your Developer account online that the status of your app is “Waiting for Upload.” This means that you’ve filled in all required fields, including text and images. Continue reading