Changed Apple ID in ITunes but it will not change in ICloud or App Store

Welcome to the Apple Community.

In order to change your Apple ID or password for your iCloud account on your iOS device, you need to delete the account from your iOS device first, then add it back using your updated details. (Settings > iCloud, scroll down and hit "Delete Account")

In order to change your Apple ID or password for your iTunes account on your iOS device, you need to sign out from your iOS device first, then sign back in using your updated details. (Settings > store, scroll down and tap your ID)

When I try to sign back in it only gives me the old ID and an option to retrieve password. It will not allow me to change ID