Can I travel with an Advance Parole document for a vacation? Marriage based I-485 is pending and I have never been out of status

Yes, that's fine. Enjoy your vacation.

Transfer from L2 to L1a? Is it possible without working abroad?

Yes, you would need to have worked for the company abroad for at least one year.

From the perspective of the Department of State (US Consulate) -- is the H1B canceled or revoked when laid off

No, it does not mean your visa was cancelled or revoked.

Congratulations on your engagement. My spouse is Australian as well, so I've been through the exact same experience myself. It is a tricky...

I would recommend emailing your detailed resume to an attorney for an initial assessment of your eligibility. Many attorneys will do this...

The short answer is that you can’t really pursue both at the same time. Contact an attorney for more information.

Yes, you can sponsor him for a green card through the immediate relative category using Form I-130. Contact an attorney if you would like...

Business travel while on H1-B?

Make sure to disclose the DUI on your visa application form. The worst thing you can do is try to hide it because that could lead to a fraud...

My chance to get approved for EB2 NIW?

You appear to have a solid EB2 NIW case. EB1 Outstanding Researcher might also be an option. I recommend consulting with an immigration attorney. ...

Here is some information from the U.S Department of State Reciprocity Schedule on India which I think will help you. Birth Certificates Available...