By law, are non-profits required to include tax deductible information on their event invitations?

Question

Where can I find this specific information online?

Answer 1

Yes, they are supposed to disclose how much of the event ticket charge is tax deductible donation and how much is "cost" for the value of the event.

Answer 2

If you mean you are inviting peple to an event, you don't have to include a tax # on an invitation.
If someone makes a donation to you, you may provide them with your tax exempt status so that you would not have to pay taxes.
I would suggest calling your accountant and he will advise you on whether or not you are required to do what ever it is you're doing.