I had applied for my H4 to H1 COS in this year 2014-2015 and got my H1 approved nd is effective from Oct 1st. I have travelled to india for a week in the month of September and came back to US on September 12th. Now my I94# has changed since i exit and renter US.
My query is while applying SSN which I94 should I be using, Since the approved I-797 has my old I94#. What should I be doing now?
Also how many days before my H1 start date should I be applying my SSN?