What are the consequences if i travel to india before / after my employer files my H1B extension


My H1B visa is expiring on 05 March 2015 and i have sent my documents to my employers immigration team, i havn’t yet received my Receipt number but i need to travel back to india on 1st Jan 2015.

  1. If i get the receipt number just days before i travel to india, will my extension go void?

  2. If i get the receipt number after i reach India, will USCIS continue my H1B extension process as usual?

  3. If my extension goes void because of any of the above reasons how should i extend my H1B visa after reaching India?