You can work for non profit or you can move to for profit employer irrespective of I-140 filing. You risk losing cap exemption, if employer...

If each of these trips are purely for tourism purposes, you should be fine. However if the purpose is to work abroad or extended stay with family...

You don't need a visa however ensure your seek entry on O-1 so you can stay until the validity of your approval.

There is no restriction on seeking admission again. However it will be up to the POE officer to make the determination on their non immigrant intent.

You can apply for U-visa is the law enforcement will need your testimony and support your application. maintain L-2 and it will not adversely...

You can retain PD but cannot file I-485 with revoked I-140. Revoked I-140 cannot be used to get H-4 EAD

Is it legal for my parents to stay even if their I-94 is past 6 months if they are waiting for the response of an I-539? The risk is of accruing...

Does Green Card Job Portability look at PERM role or I-140 role? Job duties are relevant and similar category options are available.

B2 visa extension I-539 denied and pending I-130 pending? If AOS is an option, it can be filed. If not depart the U.S. to avoid unlawful presence.

Visiting family is a valid reason to travel on Advance Parole. Ensure you return in a timely manner to resume with processing of AOS