I applied for an I 918, U visa and I am waiting for over 3 months for the Employment Authorization

You should check the processing times for an I-918 online at www.uscis.gov and see how long they project

If I marry my boyfriend of 10 years when he comes back to visit me in the US (He has a visa)

If you are a US citizen, then yes. But if he decides to stay and apply from the US, then here in CT the process is actually faster than if he...

Which is the best visa to minimise the time we are apart and that will allow me to legally work in the USA quickly

I do not understand why you would want a visa that allows you to work in the US if your goal is to wait in Amsterdam while the visa is processing? ...

Evidence of ownership in s-corp?

Hopefully the buyer has a closing list of documents they want to see from you. That will tell you what they're looking for.

S-corp transfer of shares

You are asking for advice that is best rendered in the privacy of an attorney-client consultation. There may be additional facts that would impact...

Number of shares in s-corp

I typically advise 100 shares to begin with, unless there are some particular reasons to come up with a different number

Can I sell my s-corp share (50%) to a foreign resident?

In addition to what my colleagues advise, I would add that this may well be a problem for that foreign resident to solve as well. Lots of foreign...

Can we travel to home country when our H1b is in process (currently in H4)?

You are running the risk of traveling while a change of status application is pending. You need competent advice tailored to your specific...

Yes, there will always be that risk. If you want to play decent and give 2 week notice to your current employer, you have to do what you suggested...

Immigration

Seek specific advice from attorney on your case