回复：By the way,

It looks like they would treat me as if I were still here in US. They would pay me the full benefits and full salary, and I guess the pay check would be the similar as the previous ones.
What would be the consequence if they do not agree to withhold my tax and report my income to IRS?
At this point, the future green card is more important to me. I would not do anything to put my future green card into problem. By the time I come back to US, my son is already 20.