You don't pay MA tax if you don't register it here. People in NH buy cars in MA all the time and they don't pay sales, but when us Ma folks go to NH for a car they recoup the taxes at the RMVEnded up purchasing an inventory in Boston in exact same config. Got VIN 190XXX assigned to me after placing order!
Need to wait for my SAs sales center to open to be able to call and link this to my existing order to lock in my reservation price, but need to find a way to get it to me without paying sales tax to MA and avoid home delivery as I would have a car sitting in my driveway waiting for reservation paperwork for a week.
I have a feeling it is still in Freemont as it is having me select my pickup location as Paramus NJ.