Change of employer and have valid H1B visa , Do I need to go for re-stamping?

I agree with my colleagues.

H1B Amendment RFE

As long as your case is pending, you can continue to stay in the U.S. If your case is ultimately denied after your status expires, you will accrue...

I am on H1 B working in a preschool. If I find another employer, can I simply transfer my H1 B?

I agree with my colleagues. The change of employer petition must be filed by an employer.

I agree with my colleagues.

F1 to h1

We need more information about your case. You may be eligible for the H1B, but It depends on the job requirements and your qualification. It is...

Approaching H1b limit --- NIW vs EB1 or O1?

A NIW petition for physician might be a best option for you.

Change of employer while H1-B extension from current employer still pending

Can be done, but not advisable. USCIS has to approve the extension petition before your change of employer petition is approved.

I am on L1A and joined my US company on Dec 1 this year. I fall into EB1C category. Can I apply for I-140 and 485 immediately ?

I agree with my colleagues. You can file I-140 and I-485 together.

What else can I do to submit proof for my I-9 Form??

You need to file a Form I-90 to get a new permanent resident card.

Ph.D. Physics - currenlty working in software industry. Will I be successful in EB1A?

I agree with my colleagues.