Having an iTunes account is essential if you have an Apple product such as an iPhone, iPad, Macbook, or iMac because it is the key to let you use its many services such as iCloud, iMessage, Facetime and iTunes Match. This tutorial will guide you so that you could login to your iTunes account. iTunes Login: If you have an iTunes account, also known as an Apple ID, and you are having trouble trying to sign in to your iTunes account then this tutorial is for you.