You may vote absentee due to absence from town during normal polling hours, physical disability, or religious belief. You can download an application from the Sec. of State  website

Applications can be picked up outside the Town Clerk's office, or mailed upon request, or sign a simple note, stating your residential address, where to mail the ballot and, if this is for a primary election and you are not enrolled in a specific party, please state which party ballot you want to receive.  You can also fill out the application and vote absentee in person during Town Clerk hours.