About I-485?

This is a money-grubbing new policy of CIS ... It used to be that there was no extra charge for the 765, nor 131 when filed with the 485.

What is the best way forward to stay in the US?

The lawyers can try premium processing .... or you can go home and apply for a visa stamp at the Consulate.

What document we have to provide for nickname in Naturalization application (N-400) with USCIS?

Do NOT do the online application. Print out the paper application and mail it in.

Can a French national get an extended visa while in the U.S. if France has to close its borders due to a coronavirus outbreak

The 90 day ESTA permit is NOT a visa. It can NOT be extended. Have him go to the US Consulate to request a B-2 tourist visa ... that CAN be...

Can I start a Kickstarter campaign while on L1 visa?

No. No. A thousand times no. Talk to the company's lawyer to learn why this is illegal

Options after exhausting 6 years in H1B

Yes, that might work ... talk to the company's immigration attorney.

Yes, if the employer provided a fax number, the premium unit normally sends a fax. But, less and less lawyers have a fax and CIS isn't to...

Can IO reject the entry of previously unemployed green card holder If he/she stayed 3 months outside of the USA?

Yes. If you cut your ties to the US you can be deemed to have

What happened if the officer said I can not tell you now your case is approved we gonna make a back ground tchek?

What form(s) did you file? Background checks are required for all cases now.

When did you become a resident? When did you file the N-400? Sometimes it is faster to file a new N-400.