What is better to do when finished on a I751 form?

You can refer to the USCIS website for the filing addresses. I recommend talking to an immigration attorney for your second query.

Fiance here on visitor visa, can he adjust ?

I recommend talking to an immigration attorney to discuss what are the risks of marrying with 90 days of arrival and if you are willing to take them.

You might want to send in a certified letter again and then follow up with the USCIS.

How do I locate Advance Parole applications on the monthly visa bulletin?

Just search USCIS processing times in your search engine and select the form and service center.

Just submit another one to make sure that you did your due diligence.

You should be able to transfer. You only need to inform your school when their are any changes in your employment on OPT/CPT etc. You do not need...

New H1b Rule?

You'll just need to find an employer who is willing sponsor your H-1B and pay you the new minimum wages.

These are very case specific questions. I would highly recommend consulting an immigration attorney for guidance. They will be able to advise you...

I agree with my colleague. However, I do recommend that you consult an immigration attorney before your interview and go over every aspects of your...

Will requesting travel visa extension for second time due to Covid impact US entry or green card application in future?

As long the extensions are granted, it should not affect any future green card applications.