I94 expired, if a new employer files a H1B petition and it is approved, can I start working for them right away?

No, you can't. But, the new employer can file in Premium processing to get a quick approval.

Can i work with multiple employer on one TN visa?

You will need to get your TN file amended to add the additional employer.

I have been selected on H1B Lottery, and on cap-gap, can I switch employer before October 1st?

If the company will pay your relocation expenses ... go to London and come back to work.

Yes, if there are ... for example .... 5 openings and they hire 4 .. leaving one opening ... the company's immigration lawyer can use the...

Fingerprinting takes place before the AP is issued. NOTE: It is not a good idea to travel on an AP ... they should plan on staying in the US or...

Can I get a green card from marrying a permanent resident?

Q: My question is can I still get a green card or am i risking getting deportation] A: no, you can not get a greencard until your spouse...

Where to re submit a rejected I-485, I-765 & I-131?

I agree with my colleague: "Send the I-485 and related forms and fees to USCIS lockbox address provided for filing I-485." Be certain to wait...

Marriage

Yes, a marriage in the US will be recognized by USCIS ... we don't "register" marriages in the US. Have you tried talking to the Iranian...

STEM OPT application timeline

Be patient, not all cases are processed FIFO.

When?

There is no way to know for certain. Keep going to the Consulate website.