Apple TV + subscription
I think I have multiple accounts but I can’t find a phone number to find out!!!
Question marked as
If you archive your email, then you would have a subscription confirmation email from the signup, that would list the account used.
Apple ID - Official Apple Support
If you forgot your Apple ID - Apple Support
If you forgot your Apple ID password - Apple Support
Phone support is listed here: Contact Apple for support and service - Apple Support
(Authenticating over the phone isn’t easier or faster, but there is some guidance.)