You can register online by going to the the New York State page to register to vote: Register

Check your registration and location to vote here: You Vote Here

Any eligible voter may vote: by requesting an absentee ballot. Your absentee ballot application must be received by the Board of Elections no later than October 23 (except absentee ballot application may be delivered in person to the Board of Elections office in Mineola until November 6), Request an absentee ballot.

Early Voting in New York State Your Early Vote Will Count Early Voting is just like voting on Election Day. Early voters privately mark and scan their ballot. Early voting results are counted, tabulated and included in (unofficial) election night totals.

Early Voting Locations (Outside NYC) Voters may visit any of their assigned Early Voting Centers in their county, except in New York City, where voters are assigned to one early voting site.

Find YOUR Early Voting Polling Place Early Voting Days and Times For Primary, General, and Special elections, early voters are provided with nine days to vote in person prior to Election Day.
Early voting dates and hours of operation are provided by local County Boards of Elections. Find Your County Board of Elections

View benefits and descriptions for being a poll worker here: Be A Poll Worker

If you are overseas, the following information will provide the necessary steps to vote: Overseas Information

If you are in the armed forces you can get your voting information here.

New York has voting assistance for ADA  access. You can view the machines and features here: Voting Machines.