During early voting (October 27 - November 3): 

Voters in Anne Arundel County can vote in any of the five early voting centers in the County. The closest location to District 30 is the Annapolis Senior Activities Center (119 S Villa Ave, Annapolis, MD 21401). You can find the full list of early voting centers here. 

On Election Day (November 8):

There are 47 precincts in District 30 alone. Find your polling place here.