To update your legal name with DOR, you can send proof of your legal name change to DOR through the mail or an emessage. You may call the RMV's contact center to change your address.You would file the Statement of Change of Supplemental Information form to change your corporations principal address. This guide will walk you through the steps to correctly do this for yourself in Massachusetts. Fill out This form is available here for download. How to fill out the Massachusetts Taxpayer Change of Address Form? We cannot change the address for your excise tax in the Assessor's office. What will I need when I notify the DMV? The web address to cancel your plates is here. The Internal Revenue.