Failure to pay your Excise Tax or Parking Tickets may result in your LICENSE and/or REGISTRATION being flagged/marked as NON-RENEW at the Registry of Motor Vehicles. Moreover, the Mass RMV works with other states to prevent you from completing registration and licensing functions in those states as well. To prevent further interest and fees, you must pay all outstanding items to the municipalities you owe. Once that is complete, you will be issued a CLEAR of your FLAG status (normally done electronically by PKS Associates) and you are then free to continue your actions at the RMV.
This NON-RENEW process is strictly governed by the DOR. You may read more details by CLICKING HERE.