What is my best path forward, if I want to quit my current job and apply at another company, while on H-1B with approved I-140?

On Jan 17, 2017, new H1B / I-140 rules come into play. Discuss your options with an experienced employment immigration attorney.

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How to apply for H1b visa

The H1B employment authorization is sponsored by an employer. Seek an employer that will sponsor an employee for the H visa and possibly green card.

Admitted in a wrong status.

CBP will correct their error and issue a new I-94. visit an office near you. https://www.cbp.gov/contact/ports/ca

H1B visa stamped of sponsored emp but joining Emp A (approved I-797 till 2017). I-94 given as per sponsored emp VISA Sep 2019.

Despite the I-94 admission your H1 and H4 status ends with A's Dec 2017 validity and an extension should be filed in June/July 2017, or at least...

How can I apply or sponsor a non-immigrant for visit to US? Can a US citizen sponsor a monk for non-immigrant for tourism?

An immigration attorney may assist with religious persons visiting the US. To provide such assistance a consultation would be required.

Is passport enough to prove I'm a us citizen

A US passport is usually enough to prove US citizenship. On occasion a certificate of citizenship, naturalization certificate, or US birth...

I missed my citizenship interview but never receive any invitation letter on mail. I received Form-1796 and wrote why I missed.

Upon your return from travel outside the US I recommend you make an infopass with the local USCIS office with jurisdiction over your case. If you...

Grace period with DS 2019 / immigration

30 days J status grace period follows the end of DS-2019 program and/or extension. The responsible officer has the discretion to extend a...

An employer may sponsor an illegal immigrant for a green card. However, the illegal immigrant will need a qualifying relative for a hardship waiver...

Startup Co. ... I am US citizen, Co-founder is not?

There are non-immigrant and immigrant visas available.