Dormitory rentals for non-students (e.g., summer camps, conferences), hotel/motel stay reimbursements, and the "31-day rule" for exemptions.
Please see
Room Occupancy Tax in
Section 1 (Sales Tax When Selling in Massachusetts) in the Sales Tax page of the Treasury site and use it to troubleshoot your issue first.
Please only proceed with this request form once all steps have been followed to resolve your issue via the resources provided.