I have a new h1b petition filed by an employer A, It is still pending for approval. My current employer B also wants me to work for them in US. As the quota is finished employer B wants to file an L1 for me. At what stage I can transfer my employer A h1b to employer B.
1. Can I transfer while petition pending and apply directly H1b with employer B instead of L1
2. Or can I transfer after approval and before stamping
3. Can i transfer after stamping?