No photographs are required with the I-751

If case was transfer to NVC, after approval by USCIS, How to correct our second name spell mistake? Either contact to USCIS NVC?

Notify NVC either evidence of correct name when completing NVC process. Also try to clarify with USCIS.

I-751. Are the affidavits a must or requirement to include?

You may utilize various forms of evidence including affidavits. The choice of evidence is yours.

I130 approved in 12/13/2017. i am a us citizen and my wife is in india. for next steps NVC will contact me or my wife?

As the spouse of an immediate relative US citizen the visa is not subject to priority thus the visa is immediately available. You will be notified...

H1B employment is employer specific. Separate H-1b is required from each employer.

There is no impact on your status using EAD to secure driver license

You may return to the US with s valid passport and unexpired resident card.

Whether a dependent or the principal tax filer you must file income tax each year unless exempt. You may have for fill this requirement filing...

I am an asylee derivative , can I visit my country after getting green card which I have applied last month November 2016 ?

In many situations the answer is yes. However each individual asylum derivative should review with their immigration attorney before travel.

I got to the us with a b2 visa am married to a us citizen and I 130 in process can my husband invite my parents to the U.S. for

Your parents need to apply for a visitor visa on their own merit. There is no petition from a United States citizen for a visitor visa.