Answers...

to commonly asked questions.

Why aren't I getting my daughter's calendar invitations?

quick question. I am not receiving any calendar invites from Bethany. Should I have something turned on I don't?
___________

There's nothing to turn on to allow calendar invitations. This probably comes down to the calendar account she is inviting you to. If your family has set up family sharing in iCloud then all members of the family have a common "family" calendar. She could also share a specific calendar to you by right clicking in the calendar in her calendar program and typing the email Apple ID email address associated with your iCloud account.

Most likely she is inviting the wrong email address Apple ID.

If she's using a gmail calendar and you're using and iCloud calendar you should still be able to be invited to the event. (I think) But really it works best if both users are either using iCloud calendars or gmail calendars. Not one in each.

This image is a theme.plist hack