Can H4 can stay in the United States without H1B for one year?

The H-4 is dependent on H-1B. Since spouse is not in H-1B status while employed abroad the answer is no.

Can my wife go to Canada to get H4 visa stamping, I am currently on L2 visa?

If the US consulate accepts her for processing it may be possible, assuming otherwise eligible.

EB1 question

The EB-1 c may be possible. You will not be permitted to retain the H-4

Unauthorized employment is not a bar to obtaining resident status based on an immediate relative etition. The employer remains subject to fines if...

Is the L1A a good option for me?

You have the makings of an L visa classification, however, more information is needed and considerably more is needed about the corp and the...

H4 EAD vs H1B Impact due to H1B approval

If a change of status was requested with the H1b and is approved status changes to H1b. EAD is valid on with H 4 status

Does appointment of corporate officers requires filling out Form I-9?

It they are employed in any capacity - yes.

H1b transfer before h1b transfer is approved?

The risk of transferring on filing and not waiting for decision is the filing ultimately is not approved. You should discuss with the employers...

If unsure better to submit more. Follow the for instructions carefully.

Can I and my wife, both US citizens, become legal guardians of our 3 grand children that are finish citizens to live in US?

Yes it is very [possible for you to be legal guardians, however, this does not confer any immigration status.