I got the offer letter from US university for postdoctoral researcher position. In this connection I would like to know the procedure for H1B visa. I learned that they are doing clearance and issuing of the H1B visa. I want to know whether I have to take appointment of mumbai consulate and go to the mumbai consulate for stamping of H1B visa after getting documents from them or after reaching to USA I have to stamp it. I am confused as according to the offer letter I have to join on duty on 1st July 2013 and right now I have only 20 days with me to do all this procedures.