Can a B1/B2 visa holder who files I-140 and I-485 concurrently for EB2 NIW stay in the U.S. until a decision is made? Yes

If one applies concurrently I-140, 485, 766 & 131 for current priority date EB1A, Can he stay in U.S. till processing - Yes

If one files an I-485 before the priority date is current, ...

Despite an approved I-140 for NIW one cannot immediately file an I-485, AP, and EAD if the priority date is not current

People who were removed/deported and reentered without authorization are not eligible ...

I-130 can be filed and I-485 can be submitted later when you become a US Citizen

Can someone upgrade the spousal visa application once they become a US citizen? YES

Your Filipino parents may apply for and have a chance at being granted a B2 Visa to visit you and attend your wedding even if your USCIS status is...

No need to file another I-485 as applicant may request to switch the underlying basis of a pending I-485.

H4 can travel to India before card is sent by uscis once H4 EAD status changes to "new card produced." SSN will not be a problem.