Excise tax is due thirty days from the date mailed. If you do not have the vehicle listed on the bill and have either transferred or cancelled the plate, you need to notify this office. You may come in with a copy of your New Registration or Plate Cancellation or fax us at 508-883-7043 and we will process a refund if the bill is already paid. If it is unpaid, we will post an abatement to your present bill. Please call the office if you have any questions pertaining to your excise tax bill.