Apple won’t accept my I D.

What makes you think that? Are you trying to change your Apple ID email address? "If you see a message that the email address you want to use isn't available or is already in use, check that you or a family member aren't already using that email address with a different Apple ID. If a family member is using that email address, remove it from their account then try to use it." From: Change your Apple ID - Apple Support