I am employed full-time by Indiana University and get a W2 for that.
I also earn honorarium and royalties in the US.
Between semesters or in the summer I have taught in Taiwan and China. In Taiwan I have a contract with National Taiwan University and they withhold Taiwanese taxes (20%). In China I have a contract with Peking University and they withhold Chinese taxes (about 30%). I would say that I am more of an independent contractor in these teaching jobs. I do not have full employee status or benefits and it is payment for teaching one course. I have a lot of autonomous control over how the course is taught and what is taught and tested.
Both Universities also provide me on campus housing, and a plane ticket, but not food.
Regards,
