Aunt and uncle both immigrants and no legal stay are splitting apart, they have two kids, how does custody work?

It is best for your uncle to consult with a family law attorney in the state to determine how best to preserve his parental rights.

How do I apply for my wife's immigration change of status?

Your wife may be adjustment eligible but more information is needed. It is best to consult with an attorney for guidance.

I missed my interview for naturalization, it is possible to re-scheduled it?

As you already contacted USCIS at this time to reschedule after missed appointment, it may be best to consult with an attorney for steps moving...

Will they still call me for an interview after I applied USCIS for my adjustment of status ?

These questions are best posed to your retained counsel, not attorneys who know nothing about your case. Good luck.

Can a sponsor living in different state file affidavit of support for beneficiary on different state ?

Yes as long as the sponsor is a USC or LPR and meets all other financial support requirements.

What is the meaning of I-797C,Notice of action meaning ? Is it my Greencard renewal accepted or not ?

More information is needed about your case to determine what the notice of action indicates.

Help me understand my greencard status

It sounds like your renewal was approved. You should contact USCIS to determine how to obtain the card at this stage.

What supporting documents are required to submit with form I-130 for my married son? I am a US citizen.

You will need proof of your relationship as well as proof of your status in the United States.

Yes the 21-year-old child may petition for their parents however the parents will need to remain outside of the country for the 10 year bar.

Do I need to apply for a new residency card after marriage ?

You should apply for a renewal of your permanent resident card if it has since expired. You may indicate on the form that you have a new name or...