I-140 priority date retention after revoked by 1st employer.

You may be able to retain your current priority date. Job portability may help you. No idea how long it will take to revoke the I-140. Have an...

How long will the delay be for a N400 naturalization case file transfer to Dallas field office and to new appointment date?

The delay will depend entirely on the number of cases already pending in the Dallas Field Office.

What do i do for live,study and work in usa permanently?

I suggest coming to the United States to become fluent in English. Find a good college to attend and start as a student. Then you ill need to...

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Can I hire workers under the H2B visa? And how do I show it is temporary?

Yes you can if you meet the requirements to do so. Hire an immigration attorney to help.

Can I give h1 b visa interview again?

This is an issue you will have to discuss with your employer and the attorney who prepared the petition.

Yes you an certainly request change to the office that cover your new address. However, the appointment may be delayed.

I have the EAD approval notice with me. Can I start working with that if I don't get my card before my joining date ?

No you cannot start working without the actual card.

How can I survive for 4 years without a status and work authorization?

That is the same question many people ask. You may need to return to your country.

Please let me know It is approved or RFE?

It appears that your EAD was approved and mailed to you.

Student Visa refused after application withdrawn.

It appears that you will have to make sure everything was properly reported by your first school to Homeland Security through the SEVIS program. ...