How to get voluntary departure if I am illegal and overstay ?

Voluntary Departure is a status conferred by an immigration judge pursuant to removal proceedings. I would just buy your ticket and leave if you...

F2b category question

I would notify the USCIS by letter of your change in status.

Can I apply Green card in EB4 category?

This question is best directed to your contact at the armed forces.

Can I reuse my priority date even after I140 was revoked?

Generally, if your petition was revoked or abandoned, then you will have to file a new one. You should discuss this with your new employer's counsel.

It may be difficult to get the visa with a potential 10 year ban. You will have to file for a waiver. Just because they haven't notified you...

It depends. It's probably best you discuss this with an attorney.

I got a 10yr multiple-entry US visa 8 years ago but I'm going to use it for the first time only now, will I have any problems?

I think you should be fine. There is no reason to suspect your visa was cancelled. The fact that you haven't used it much, is actually a good...

Can my green card be re-instated?

No, you abandoned your green card. You would need a fresh application in order to receive a green card.

I just got married last September 2016, and my husband doesn't want to petition me anymore, is there any other way for this?

Unless he abused you severely, you are likely out of luck. I would consider moving back to your country if he will no longer support your petition.

How I can stop the USA green card category fx3 for my son

Does he have his green card yet? If not you can withdraw support from his application. You can also notify ICE if you think he has committed...