Is SSN number mandatory to apply for EAD under L2 VISA

It is not required, on the contrary, you need an EAD to get a SSN.

I've already had B1/B2 visa for tourism. Do I need to reapply B1 visa for independent research in US?

You do not need a different visa, if you are keeping the terms of your B1/B2.

I was granted DACA and I also have a I-130 approved I would to adjust my status here, should I apply for an advance parole?

Yes, you should apply for advance parole.

Can I travel before H1b approved?

It should have no impact on whether the visa is approved or denied. It can affect whether you are granted a change or extension of status.

Can I Work for my employer outside the US for the total time of the greencard process, and maintain a legible LPR application?

You do not need to work with the PERM petitioner at all, in or out of the U.S., until and unless the visa is approved and issued to you.

Is immigrant visa the best one for me?

Your best chance of being approved is an immigrant visa together with a K3. That lets you travel to and from the U.S.

Regarding your first question, I wonder why you would want to withdraw your request, since it could leave you without status? There is no set...

Oath que

There are great differences depending on the nearest federal court and the court's schedule.

I received a request for evidence form i-72. They are requesting proof of marriage. What should I give them

Your detailed affidavit about how you met and decided to get married, your spouses statement, and the statements of three witnesses. An attorney...

Hi, i and my wife won the dv lottery in 2012 and we went for an interview yesterday and they said we made a mistake and .

Did they deny the application, or did they say you could fix it? You could request an advisory opinion.