Detailed Experience letters from previous companies.

You need to check with the particular former employer(s).

I am currently working for company X on H1B, I have accepted offer of company Y & they have filed my LCA. How soon can I join Y.

The regulations allow you to start working for the new employer upon filing of the H-1B petition with the USCIS (assuming you were in lawful H-1B...

Can someone get a job without a green card.

His immigrant visa stamp satisfies the I-9 requirements in order for him to work.

If you are going to be outside the U.S. for up to 2 years, then request 2 years.

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Employers are not obligated by law, to sponsor anybody.

I got my I 797 approval and would like to know how to get date in Dubai, UAE to stamp the visa in my passport please advise

You can find out the visa application procedure by checking the Consulate's website.

Can my wife (on H4) stay in US for few months as I need to travel for a new project in Canada and my H1B is valid untill 2018

I believe 12 months would be considered a meaningful interruption of your H-1B status, thus your wife would not be permitted to remain in H-4...

I've been married for 20 months and about to submit docs for green card.

Your spouse can sponsor you anytime after you are married. If your spouse is a U.S. citizen then you can also apply for adjustment of status. As...

Can I apply I-765 together with her i-130 for my daughter at the same time?

No, the I-765 does not grant the right to file an I-765 for an EAD. You can file for adjustment of status for your daughter only when the Priority...

I am on H4 visa and my husband is not providing me with any basic needs, can I file a case against him ?

This is not an immigration issue. You should consult with a family law attorney.