You should find a new joint sponsor as soon as possible and file the new I-864 at the consular interview for the visa.

Perhaps you mean you want to file an immigrant visa petition for her? You must complete the I-864. You can also have a joint sponsor.

The affidavit of support is for the named immigrant, not any other individuals. So no, you are not responsible to support the immigrant's relatives.

If you are in valid R1 status, and you have an approved EB3 visa with a current priority date, then you can file for adjustment of status in the U.S.

If you are asking about Mexican law, you should contact a Mexican immigration lawyer. And yes, it could be an issue returning to the U.S.

No, there is no such rule. Rather, she risks losing her green card if she leaves for six months or more.

Inviting someone to visit you in the U.S. should not have any impact on your permanent resident status in the U.S.

Not recommended. Instead contact customer service to get a passport stamp to show your status while you wait for the card.

Your spouse should file for him since he is an immediate relative of a U.S. citizen by virtue of being a step son.

Once you are in H1b status, you can port to a new employer as soon as the h1b petition is received by USCIS. If you are not yet an h1b and you...