How can I sign in to view billing information

Well, billing info are available when you sign in with your Apple ID account, 'cause they are private info.

See your purchase history in the App Store or iTunes Store - Apple Support

Regards

Giulio

Hi

Go to iTunes main page bottom of page apple I'd click that view I'd Go to manage payments check your credit card details.

Also check your subscriptions

Cheers

Brian 🇬-1F1E7;