[QUOTE=Mogwai;2203548]
However I don't know the requirements of the tax authorities (or any other authorities for that matter) in the USA.[/QUOTE]US is the same. There is also a double taxation issue if one stays in another country too long. For some US states, when someone is working in offices in two states, the hours in each state also have to be tracked.
Usually manager will not know the tax implication, but when it reaches the HR, the HR in an international company definitely will know.
Unless you don't care losing your job, it is not a good idea to do it. I personally don't want to violate the trust of my boss so I always tell him where I am. I had a conference call with several customers early this morning at 4 AM, but I fall asleep. Fortunately, another coworker also attended the meeting, he called me on my company number to wake me up. The coworker didn't know where I was. It could turn out badly for me and my boss if I missed the meeting.
