Can I change two jobs one after the other in H1B with an approved i140 ( past 180 days) ?

The original I-140 covers all future H-1 extensions.

ThTis an excellent question for the Immigration attorney being paid to represent you.

Currently I am in my initial opt of F1 Visa. My employer is willing to process through green card, can I know the process?

We do not have nearly enough information about the job or your background: what are the minimum requirements for your job in terms of education and...

You need to consult with a Board Certified immigration attorney about this question and the AVVO question you just asked.

Can a US citizen abroad come to US for a few days and marry an F1 student during OPT grace period?

You need to consult with a Board Certified immigration attorney, at least by phone, since your plan will not work. She will not have advance...

Renew green card or apply citizenship ?

You should renew the green card and use a friend's address in NJ. You must live in NJ for 90 days before you can file for Natz

If we miss the I-751 interview, will I be issued an NTA (Notice to Appear)?

It is certainly a possibility that an NTA could be issued. But more importantly, why would you miss your interview?

How can I apply to get an f1 visa

If you have not continued to file B-2 extensions CIS will deny the change of status to F-1 so you should leave and apply for a visa at the US...

If I withdraw I-751 support due to divorce how soon will it catch up to the original petition?

Once you are divorced, your spouse can still file an I-751 waiver and your affidavit remains in effect until she becomes a US citizen or works for...

Does someone who already applied for an l-130 form need to go back to his country? or can he or she pay a fee to stay in the US?

He can only stay in the US if he has legal status. Just filing the I-130 does not give him any status at all. And we really don't have enough...