I am in the last year of H1B and my my PERM is certified. I came under the Rest of the World(ROW) chargeability, which means the priority date is current. My employer is willing to do concurrent processing(both I-140 and I-485) if eligible.
The issue is my dependents are in India and will be staying for another year. I am told by company attorney that I-485 can be processed only if present in US. The HR advised doing H1B extension after I-140 for both me and dependents now, and later process I-485.
Question: Is there any way I can process I-485 along with I-140 for myself alone, and later do that for dependents? If yes, how(under what visa) could my dependents travel to US, to have the I-485 processed?