iTunes Connect is the way for members of the iOS Developer Program and Mac Developer Program to upload their apps, edit their descriptions and metadata, and view finances earned. iTunes Connect is also used for book publishers to sell their books in Apple's iBookstore.
Accessing iTunes Connect
Once completed the enrollment in the iOS Developer Program or Mac Developer Program, sign in to iTunes Connect with the Apple ID. iOS Developer Program and Mac Developer Program can use the same iTunes Connect account to manage all apps.