What to do if my iPhone tells me that my Apple account has been deactivated

Please contact official Apple Support (the people responding on this forum are Apple product users like yourself and cannot do anything with your account) for help with an "inactive" Apple ID.

You can reach Apple Support using this link --> Contact - Official Apple Support

or by telephone at one of the numbers in this support article --> Contact Apple for support and service - Apple Support

Note that having an "inactive" account is not the same as having a disabled account. If your account says it is "disabled", see this article --> If your Apple ID is locked or disabled - Apple Support

If you deliberately deactivated it, read the section "Can I reactivate my account?" in this support article --> How to deactivate your Apple ID account - Apple Support