Massachusetts voters now have the ability to register into the Socialism and Liberation Party, and election officials will tally how many people do that. This is the first step for an unrecognized party to become recognized. However, the job is veery difficult; Massachusetts requires that 1% of all voters register into a party before it is ballot-qualified. That takes approximately 50,000 registrants.
The other path for a group to become a qualified party is easier. If a group runs someone for statewide office who polls 3% of the vote, that group also becomes a qualified party.