I applied for adjustment of status as the spouse of a US citizen.If I get laid-off,do I have a legal status?

you are in a period of stay authorized by the Attorney General. You absolutely should apply for the work and travel permits -- no cost, why not.

The I-140 denial is not considered a visa. It is a petition for an immigrant visa. Visas are issued by DOS at the U.S. consulate overseas; the...

If you have an EAD or underlying nonimmigrant status you may move immediately. The I-140 is an offer for future employment so if that is still...

What are my options expiring two year green card?

You and your spouse will need to file the I-751 jointly and demonstrate with lots of objective evidence that your marriage is still valid.

Mandatory Information on H4 application ?

It reassures USCIS that you are not doing under the table work to support yourself while here. Include it.

Green card marriage required applications and total fees ?

you should also file I-131 for advance parole. Total fee is $1225 for adult or $750 for child under 14 filing with the adult.

It would make more sense to change to consular processing by filing an I-824.

Can I file for unemployment, currently being on H1b and will that effect my green card application in future?

Unfortunately no as you can't say you are eligible to accept other employment. As you know the H-1b is employer-specific.

As a student on F1 visa, can we volunteer to help w/ COVID, such as emails?

there should not eb a problem sending emails or other similar tasks on behalf of the anti-covid-19 effort.

I 130 I 485,Second interview completed marriage based, moved to another state, and back again to same state, third interview?

Make sure you file an AR-11 and I-85 for each move., Provided you are moving together this should not affect your case. It is up to USCIS to...