When you forget iTunes log-in password, that means you lose Apple ID password. Apple ID, often created with your Email, is the personal account you use to access any Apple services like App Store, iTunes, Store, iCloud, iMessages, FaceTime and more. If you lose iTunes log-in passcode, you will no longer be able to shop in the iTunes Store, sign in to iCloud, purchase apps, etc. It is time to reset your iTunes password. You can go to
iforgot.apple.com on Safari, Chrome or other browsers.
In addition, before you choose to erase your iPhone/iPad/iPod, you should first back up your valuable files. Here we sincerely recommend the professional iPhone Data Recovery to save your data to PC/Mac