Can my green card husband sponsor me for a GC if im pending a change of status

Yes, it will be denied. You must be in status until your I-485 is decided.

The process of usa green card abandonment?

Yes, she must submit the original green card with Form I-407.

Can my mother-in-law stay in US passed the entry expiry until she gets her visa extension I539 form processed?

Since she filed the request for an extension in a timely manner, she can stay in the US until the USCIS decides her application.

Self-employed joint sponsor with sufficient business tax returns, instead of personal tax returns.

I agree with my colleague. You need to consult with an experienced immigration lawyer who can review your joint sponsor's income and assets. It is...

No, unless it is a requirement of your current employer, you cannot work independently and get compensated for it.

Since your income alone is not sufficient to sponsor your children, you and your sponsor must file Form I-864.

Can i move ?

It depends on what field office services you. Call the number on your appointment letter or call the USCIS Contact Center at 800-375-5283 and ask.

You cannot work until you receive your work permit. If you try to work before then you and your employer can get in trouble.

He should be fine. I agree with my colleagues that he should carry copies of his DACA approval, work permit, and driver's license.

I received my naturalization certificate last week and i am intending to petition for my parents but my 2019 income is zero?

Yes, you should enter 0 for your income. You should consider having a lawyer look at any filing that you plan to make on your own. It can save you...