Person may apply for U visa, if qualified and speak to an immigration attorney for further guidance.

Yes, you may reenter US with less than 1 month left on stamped H1B and H4, with an approved H1B.

It depends on the local field officer officers. What is true in NY may not be true in AL, or CA vs FL.

The EAD is filed under C9. No additional fees are required.

This may be corrected with the issuing agency and USCIS informed of correction with supporting documents.

The I140may be filed abroad, and your employer can file for H1B extension.

At this point, you have to go for it. It will be up to the discretionary decision of the visa officer. Good luck to you.

I agree with both above lawyers. Your case would be 4th preference case, the lowest category. Current waiting time is from anywhere between 12 to...

Look at official Visa Bulletin using your priority date. The current month is October.

Answer "yes" on the Ds260 and upload documents. Consult a lawyer if you have further questions and/or need assistance.