Applying H1B from H4 - Should write SSN or not?

Yes. You should put all digits of your social security.

Our F3 dates are current, can a sub beneficiary (spouse of main beneficiary) - file I-864 for principle beneficiary ?

Joint sponsors are allowed for 864s.

What I-485 Suspension due to additional evidence might mean? (asylum based)

The RFE will say what documents are needed. Upon submission of the response, the I-485 processing will continue.

Can't file my EAD extension approval notice?

Yes. You can call them or do an infopass.

Question regarding how to fill out work permit(Form I-765) through green card considering particular situation

1- I am applying for: permission to accept/replacement/or renewal. (tricky, not sure which one would be proper) - permission to accept 2- Have...

What is the easiest visa to obtain to get my son from Ghana to the US and become a citizen? I am a US citizen.

If he’s a minor, just do I-130 / consular processing. .

How can I apply for voluntary departure?

You can apply for voluntary departure in writing through a motion.

Can my father be a joint sponsor for my fiance?

Someone who is either a citizen or permanent resident with sufficient income can be a co-sponsor.

Filing the i130 & the i485 together is faster than filing i130 first for my sister who is in the us undocumented & how long does

Depends what country she’s from. F4 Philippines for example takes 23 years.

No. .