Abandoning green card and applying for visitors visa (b2)

Whether you are issued a visitor visa depends on the documentation of your ties to your country.

If I came up on a visiting visa and my husband started filing for me and i got an extension would it mess up my visa?

Depends on what your spouse's status is and what has been filed. You should retain an experienced immigration lawyer to review all the facts,...

My husband filed i485 to readjust status to get his green card in november 2012. In february 2013 i wrote a letter

Yes, but now you will have a much higher hurdle to overcome. You will need to retain an experienced immigration lawyer to review all the facts,...

EB1 and EB2 for same person one by the company he is working and another by a consultancy will cause any problems ?

I have not seen it be a problem, but can see how a USCIS officer can make it one.

GC in EB1 on L1A possible?

Yes. Your employer needs to retain an experienced immigration lawyer to review all the facts, advise them, and handle the case. Your employer...

Can a third party get a copy of a birth certificate submitted to the U S immigration dept by a foreigner for residential status

No

Granted F-2 with pending I-140 and I-485 applications

This is a gray area in the law. In my opinion, yes, you can work. However, some colleague believe you cannot. USCIS may have the same split in...

I filed for my husband greencard went to the interview then uscis sent a letter saying he was married on his nonimmigrant visa

You need to retain an experienced immigration lawyer to review all the facts, advise you, and handle the case. You can find one through...

Applicant only.

What happens to O-2 visa if an O-1b changes employers? Will it still be valid if the O-2 works for the O-1b directly?

Depends on whether the O-1 continues to maintain O-1 status.