Inactive email
My App Store email is no longer active and I need to change it to my other email. How do I do that?
iPhone 6s, iOS 15
check your Apple ID via your email box, see this Apple article: If you forgot your Apple ID
If you forgot your Apple ID email address or phone number - Apple Support
OR see -> Having trouble signing in?
https://iforgot.apple.com/password/verify/appleid
See this Apple article: Change your Apple ID
Change your Apple ID - Apple Support (SG)
Have you forgotten your password? -> See this Apple article: If you forgot your Apple ID password
If you forgot your Apple ID password - Apple Support
Then see this Apple article: What to do after you change your Apple ID or password
What to do after you change your Apple ID or password - Apple Support