I got a greencard based on "extraordinary ability" in arts.Can I open a company or work in differen field simultaneously?

Having a green card means that you can live and work legally in the U.S. What type of work you do is entirely up to you.

USCIS made a data entry error in marriage based GC filing, how to resolve this conveniently?

If you have the same biometric data as someone else already in the system, then that person's information could be applied to you. The way to...

I’m in deportation proceedings..

You do need to hire an immigration lawyer to represent you in court.

Can I sponsor my mother in law on my daughter birthday

Your daughter's birthday or not, you are not allowed, under current immigration laws or policies, to sponsor your mother-in-law for permanent...

Will my current F-1 visa be still valid once my spouse files my form I-130 petition and this is for Consular Processing?

Your F1 visa will not automatically becomes invalid.

Will I have a problem with uscis if I worked without authorization when I file for adjustment of status?

You will be forgiven if your spouse is a USC at the time you file for adjustment of status to permanent resident.

That's interesting: you do not believe the USCIS Representative. Also, you must not have travelled in a very, very long time. You have been...

Daca

You should have an immigration lawyer review your entire application and disorderly conduct records. Perhaps after that you can get an answer to...

Duration of stay in the United States on a visa A2?

The A-2 visa identifies you as a Diplomat or other foreign government official traveling to the United States to engage solely in official duties...

To my knowledge, the Form I-212 waiver, once granted, remains valid unless it is revoked.