I’ve moved from Employer A to Employer B in Jan of 2020. And Emp A withdrew my i140 (with P-date July 2016, after 180 days) and Employer B is yet to start my GC. Should the dates move drastically, and I decide to move back to Emp A, should Emp A start the process all over again? Or will he be able to just file my i140 and i485 concurrently?
Any advice is much appreciated.