Can I file for green card without my wife birth certificate ?

Are you the USC or the Immigrant? Read the instructions carefully. There are exceptions to producing a BC but you must meet one of those...

Can my sister and her husband get AOS if they already have B2 visa?

Based on what you have stated your sister and her husband do not qualify to adjust status in the USA.

Would I be given extra time to find a lawyer?

You can make the request and if the request is reasonable you may be given time to find an attorney.

Can 11 year old niece (Indian) study in a US middle school for a year? I am a green card holder who can sponsor her visa.

No. An aunt is not an immediate relative and therefore you do not qualify to sponsor your niece. She may apply to a student visa or look for some...

Depends on the name change and why you are making the name change. You may be able to use the new name on the N-600 application and her name will...

PR is a US Territory. Even so, you must go pass BP when you exit the USA and when you enter PR. If your EAD is not also a travel document I do...

Can i take a job offer in out of state whilst waiting for my green card?

Assuming you are awaiting a decision based on an application through marriage to a USC this could effect the decision if the USC becomes aware of...

Applying for Citizenship. Can I use a mailbox as a physical address on the n-400?

No. Physical means just that. You will need to establish a permanent physical address.

How long do we get decision?

Based on the foregoing you have a minimum of months to wait. The facts above do not even indicate you have received the DNA results and submitted...

I am on removal proceedings ?

it is not unusual for a case before the court to be rescheduled. The court may or may not agree to terminate your case based on the facts and why...