You Don't Need a Home to Vote
From the National Coalition for The Homeless: The cornerstone of our democracy in the United States of America is the right of citizens to make their wishes known through the election process, yet low income voters, and particularly persons experiencing homelessness, are consistently one of the most poorly represented blocks when it comes to voter turnout, historically having faced numerous barriers across the country which have limited their participation in their election process.
Many potential homeless and low income voters may not have the appropriate identification documents required by some states to register or to vote. In fact, most states do not require residents have a traditional residence in order to vote in elections.
For more information https://nationalhomeless.org/campaigns/voting