Is it legal to work before receiving a copy of new LCA? Is any grace period available?

I would not work, but I do not know all the facts of your case, the lawyer does...

Do i need to send the envelop or just the rfe letter sent to me by USCIS in my response?

Send the blue sheet with the bar code ( please note.. it is not always blue)

Interview done but Given 221g Blue Sheet fo r submisstion of additional documet.what be the next step is CO issue me a visa.

You may want to contact your local Congressman and Senator to see if they can help

Filled a voter registration by mistake I'm non-citizen, what can I do to mend this situation?

I agree with the other attorneys

I want to become a resident of the usa thru my wife who is a citizen will having a prostitution charge affect me?

I would not travel until taking with an attorney The prostitution charge will affect your case I would hire a lawyer

How can I get my refugee fiance to the US permanetly with out a birth certificate?

It s could be possible, but as of now, the Department of state indicates birth certificates are available

Which consulate in Australia will you n be going to?

Question re: sponsoring company for visa?

It iwll be harder to do this as you propose

Am i able to submit the i290b for a family member even though i was not on the original application?

a 290B may not be the best or cheapest wayt to go There could be other options I would hire a lawyer to help this time around

How long on average does it take for I-485 to be approved after I-140 was approved? (EB-2 / Nebraska Service Center) ?

6-12 months