How can I delete a toll tag?

No, you cannot delete a tolltag. If you need to remove a vehicle from your account or cancel your account as a whole, you have to call NTTA.

You should be able to go online to whatever email you set it up with to take it off

Cut it in half and it won't work no more or contact this place until then be make model number tag number all the information you can think of and they should be able to take it off your account hope that helps you