What floor do I go to to change my name on social security card

You have to go to the social security administration office in jamaica .. not the court house i believe

Thanks I'm going down to office

This cant be done online, however you can download forms needed from ssa.gov, as well as steps required (legal id required...). Once you have all that in place, you can visit local office or mail it in. Local office is at 155-10 Jamaica Ave, Jamaica, NY