Can I join Selective Services if I have a Deportation Order from when I was a kid?

You are simply not eligible for SS registration.

Green card terminated for failure to submit divorce decree in 87 days. Sent letter with explanation why.

You will still be placed in removal proceedings by the issuance of the NTA.

H4/EAD Application with Old I94

Normally USCIS figures the discrepancy by itself and updates your record without contacting you.

WHEN TO CHANGE FROM H1B TO H4 EAD (MY I-765 HAS BEEN APPROVED HOWEVER I-539 H4 is STILL NOT APPROVED)?

Receiving that EAD will still take time. Wait until have it in your hands before notifying employer.

Simply because you are a foreign national.

How should I proceed with changing my legal name?

Your original marriage certificate is all the legal proof of name change you need. From there can proceed to change your SSN and DL.

Each separate work location site will need its own LCA.

Can i ask?if i live in country illegally and have a child here with citizen from that country how can i get out?

You need to contact the nearest branch of either the Legal Aid Society or other pro bono or low bono legal services ASAP.

H1B- Job title change but same employer?

Let that employer file an H-1B petition on your behalf and see how it goes.

My H1b got approved last week but my employer laid me off after H1b approval. Can I transfer the H1b to new a employer?

Yes, you have 60 days as of your termination date to have another employer file a new H-1B petition on your behalf.