I have an expedited removal with a 20 year ban. I reentered the US without permission. Do i have a permanent bar?

You are minimally barred from admission for 20 years and not eligible for adjustment of status under current law.

If the Real Estate licensing authority means "lawful Permanent Resident" then an E-2 is NOT a "resident alien."

H1B amendment and h1b transfer at same time

Consult with an attorney to obtain specific, meaningful advice.

G325A

The form requests information as to your "employment" over the past 5 years. Ownership of an LLC may or may not have involved any "employment." ...

H4 to H1B while having prior H1b Approved copy which is unused/not activated

You would need to file an application for a change of status or obtain a new visa from outside the US to be obtain a new visa status from that in...

Can I reinstate F1 status through a new public college in SC?

Reinstatement must generally be sought within 5 months of falling out of status.

Do I still need to file CSPA FOR MY NEPHEW IF NVC ASKED FOR HIS DS 260

His name should have been listed in the Department of State Correspondence. If it was, then he is probably included.

Only change in passport name is enough or I have to change f-1 i-20 USC-IS i-94??

You need to consult with an attorney and have all of your questions answered comprehensively.

How USCIS sees an affidavit letter that supports a marriage was in good faith?

"Helpful," yes, but in no way sufficient in and of themselves to resolve your case. Consult with an immigration attorney.

I'm from Iran and i got grant asylum since 06/2012 by judge immigration then i applied for green card since 11/2013

It is possible to sue the USCIS in Federal Court to compel action on an unduly delayed application.