He should file for her and include his most recent tax return and a job letter indicating title salary and dates of employ with the I-864 form.

You wouldnt need a visa if Jamaica os part of the visa waiver program.

If you were married when you got certificate you wont be ableTo change. Use US passport as proof of citizenship if thenissue bothers you that much.

If they left country - tourist extension app was abandoned qnd denied.

It means wait for the card to arrive. If your current card is expired and you need to travel make an infopass appt and get a stamp in passport

If you dont wsnt to opt for the very expensive mandamus action in Federal Court, call USCIS at 18003755283 and tell that case is outside processing...

You were eligible as of 9/2020 as you could habe filed 3 months before 3 year anniversary of initial green card.

It is normal for it to take many many monthw. Make an inquiry with USCIS every month.

You should have a consult with an immigration lawyer - may be possible to reopen or appeal.

The work would not be authorized but if you worked you could pay taxes on your income using the social security number