If it is your plan to work for both companies, both companies may file H-1B Change of Employer (concurrent employment) for you. If you are still...

Yes, you should bring your Tax Returns for the past 3 years (at least).

If your previous H-1B was not revoked, your new employer may seek to file an H-1B Change of Employer for you.

There is no liability of I-134A sponsor when the beneficiary violates the terms of the visa.

Possible, subject to review of the university's qualifications and after you complete a Master's program. An H-4 dependent may also go to school,...

You may be able to seek a waiver of joint filing. Please consult with an immigration attorney in person to review all your records.

It may be a little too early to find out the situation now. You probably need to wait another 2-3 weeks at least.

As there is possibility that you can be questioned about the arrest, you might want to consult with an immigration attorney in person to review all...

You still remain a permanent resident of the United States as the Receipt Notice told you so.

I am forwarding this question to my colleagues with expertise in employment laws and employee benefits.