If DMV's records do not reflect your current name or address, or date of birth or gender, you must first correct this information before processing an online Voter Registration Application
how do you do the signature online?
When you agree to the New York State Department of Motor Vehicles Attestation in the voter registration application you authorize DMV to send the Board of Elections your digital signature we have on file from when DMV issued your Driver License, Non Driver ID Card or Learner's Permit. Agreeing to the attestation is the legal equivalent of a handwritten signature.