Currently I have EAD with Travel permit with Green card application pending. I am planning to travel outside

You advance parole document has nothing to do with your ability to enter another country - it is only for entering the U.S.

My H1B extension was filed on Dec 3,2014 and received RFE on Jan 21,2015 and RFE responded on Feb 4,2015.

According to the USCIS your employer should receive an update by April 5, 2015 - if you do not then your employer can call the USCIS for an update

Will I be able to apply for H1B if my I 140 NIW is pending for 365 days?

Yes, once your I-140 has been pending for 365 days, your employer can file to obtain H-1B status for you.

Please advice me about Immigration Laws

You are free to travel while the application is pending. If you are a U.S. citizen, and your husband is applying for adjustment of status, you...

How does Future employment green card filing work as am not living in the USA or currently notworking for the company filing

An employer filing a permanent residence application for an employee outside the U.S. is not uncommon. There are many variables at play, including...

Will it be ok if I travel outside the U.S. using my green card even tho am not married anymore

As long as your green card is valid, and you have no other grounds for inadmissibility, the fact that you are divorced should not prevent you from...

I have abandoned my green card by staying outside of US to long and I now want to return

The entire process will need to be restarted - with your sponsor filing a new I-130. Since you are outside the U.S., you will go through consular...

Do I need a new H1B stamp if existing is valid when I have a new employer ?

You can continue to use your prior H-1B visa stamp, even if it is for a prior employer, through it's validity date.

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I overstayed my B1 B2 visa.

Your sister needs to answer all the questions on the DS-160 truthfully - the consequences of being untruthful are far greater than her admitting...

Not having any visa in new passport due to loss of passport, will it cause problems for my new H1 visa stamping in India?

Having lost your passport, by itself, is not an issue. And not having a valid visa in your passport, as long as you have maintained valid status...