Mass.Gov Mass.Gov is the Commonwealth of Massachusetts' official website. Visit Mass.Gov to: find out where to renew your driver's license or file your taxes online; find out who your elected officials are and where to vote; start a business; plan a trip; locate a specific state agency; learn about your city or town; and much, much more! in Governmentwith commonwealthgovernmentmass.govmassachusettsofficialrenewvisitwebsite