https://www.ssa.gov/pubs/EN-05-10137.pdf Review this as your starting point

Should we apply for a green card now or wait until I get my citizenship?

Wait until Naturalization Certificate in hand then file

Is it possible to convert H1 to H4 thru I-539 when spouse DOES NOT have an APPROVED petition and current extn is in progress?

. Can I apply for a change of status thru I-539, even if my wife does not have an APPROVED petition. —- you may, sure 2. If yes, how USCIS...

Green Card EAD renewal and DUI

Must be transparent and disclose your DUI. Depending when EAD expires, would be best to include the DUI disposition (when case is wrapped up) with...

Wanted to transfer my sevis to different University ?

Your SEVIS is one filing and H1B is another and one will not play a role in the other.

My wife and I live abroad, how the affidavits work when living and applying for the green card from a foreign country?

Find a joint-sponsor. This joint sponsor does not need to be a family member (for now, changes to this are being promulgated).

How could we answer the question in i-539 for H1b or L1 if we had unauthorized work during NIV but departed and reentered US?

For you and to gather additional details it would be best to have a private consult off this public forum

L2 EAD Extension based upon L1 I94 extension

Yes you may/ as a derivative spouse, your status would mimic your spouse’s; engage an attorney to file proper filing for you.

I am out of status for 98 days,will i get a US visa if i apply it again?

Be honest and establish ties abroad to demonstrate non-immigrant intent; what and how will be adjudicated - is up to the discretion of the...

Complicated situation

You should not complicate your future United States immigration possibilities by leaving the USA before immigration proceedings are commenced...