My H1B extension is being processed. Can file my dependent’s H4 EAD while my case is still pending with USCIS?

YOu can but be prepared that the EAD will not be issued until after the extension on the H1B is granted.

Evidence establishing that the not custodial parent was actually participating in the child's life.

What happens if no information is received from NVC?

Sibling petitions take about 16 years for most countries but not all to reach the currency of the PD. This is why you have not heard from NVC. For...

Can i file new H4 extension when previous is still pending?

Yes you could. Whether you need to is a different question all together. You should talk to an immigration attorney about it.

i130 / i148 pending case, upgraded i130 from F2A to IR after neutralization of spouse. Is it okay to travel out of US ?

If you hold a valid AP document and you also have a valid national passport, you can travel.

How can we change immigration status through business ?

Depends on the country of which you hold your passport. Talk to an immigration lawyer.

What to do if after a good interview an immigration officer went to military and haven't transferred a case to anyone ?

It is a routine situation in many places for many people. It is not the end of the world though it is very unfortunate indeed.

What is best option file for a motion to reopen or re file a new I-485? my I-485 got denied.

Ask a competent immigration attorney to review the entire record and provide guidance would be your best options.

Where can I find my I-140 approval date?

Notice date on the I 797 Approval notice is the date.

Question regarding child support and custody

I changed the practice area so you could get answers form family law attorneys in CA.