I purchased a used car from MA dealer in Nov 2006 and I paid CT sales tax on that car when registering in CT. Two years later i changed job and moved to MA and registered the car in MA. At RMV i was asked to pay MA sales tax + penalty amount for not paying sales tax when the car was initially purchased in Mass. When i told that i already paid the salex tax in CT then they told it should be paid in MA so contact CT and get the refund from them if possible. Kindly let me know what to do?