Can a non-US company file for L1A visa for a person who is already in US on H4 visa, to setup a US branch?

this requires better planning. the foreign company should retain an immigration attorney to assist them with the process.

What does it mean to have inactive status

what record are you referring to? please provide some more details.

I am in 2nd year of H1B and recently my GC - I140 has got approved , will my wife able to work now for H4EAD?

yes she can request the h4 ead at this time.

Ead

There is no cause of concern. This is not irregular.

My kid who also writes but is a minor wants to self-publish book. Can that be done, me being on H1b

Your son can directly receive the income generated from the publication.

Please consult an immigration attorney for detailed evaluation of the relevant facts and options.

I am working on H1B visa as software engineer. Can I self publish a book on Amazon. Will that be considered under royalties?

highly recommend that you consult an immigration attorney directly to determine a path forward.

H1B Tenure and Green Card Filing.

clock stared at entry. changing employers - no impact on PERM.

Can I change status to a F1 student visa from the US even if I have a B2 visa rather than a B2 Prospective Student visa?

It is possible. Requires meeting some timeline and other technical requirements. Please work with an attorney.

How to obtain fast US Citizenship for my wife and I.

Obtain citizenship for yourself and then initiate the LPR process for your wife.