In most towns you go to the town clerk to register to vote. They will have you fill out an affidavit for your residency. Then you fill out the voter registration form. The form will ask you for a bunch of information. You only need to give them your name, address and your signature. You do not need to give them your drivers licence number, SSN, date of birth, or anything else. The town will not send you a voter registration card. You will need to bring an ID to the voting polls if you are registering to vote that day. If you register as Undeclared on the form, you can still vote in the Primaries. You go to the Primary and change your party status before you vote and can change it back when you are finished voting.