Yes, you can apply and then return briefly. There are no fingerprints for the L-2 EAD. Don't you have an attorney who can answer these questions?

Must You Leave The U.S. to Wait For Your Green Card?

You really need to contact a Board Certified immigration attorney immediately to get the green card started. You cannot wait past the fourth...

How to apply for an permanent working Visa and Also apply for a citizenship visa?

You need to look for an attorney who specializes in immigration law, does not practice any other type of law, and has many years of experience. ...

SB-1 for my Mom

You should review the Consulate's website for their requirements and instructions. The application must be filed directly with the consulate.

What is the typical timeframe required to receive a CR1 visa from the moment a valid marriage certificate is obtained?

What you are discussing on a public blog is visa fraud.

Which is better and faster, applying as an over21 unmarried son of a green card holder or as a brother of a citizen?

The sibling case is slightly slower but not much. You should file both.

How do I obtain a work permit ?

I assume you have an immigration attorney helping you and that is who you should be talking to. AVVO is for people who do not have attorneys. ...

Headquarters

Mandamus is no longer available for adjustment of status in this Circuit. If it is a Natz case you have options to speed them up.

Can I adjust status?

Yes, you can, with affidavit testimony regarding your entry.

Hii.. I came to USA on F2 Visa in feb 2015 want to change to F1 ? fastest way and safest way to change my visa status?

Yes, it is risky and basically, means you cannot travel until you get another status like H-1.