Apple ID verify
How can I verify my Apple ID for itunes
iPad Air, iPadOS 16
Question marked as
Sign in to your Apple ID account page and you need to edit / update your Apple ID details -> https://appleid.apple.com
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You are sign in here . . . with your Apple ID & Password.
Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.
You can’t merge multiple Apple ID accounts.
What happens when you use the same Apple ID & Password that you use to sign in here?
See the following Apple articles
Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support
Manage and use your Apple ID -> Manage and use your Apple ID – Apple Support (UK)