Could you tell me what the "International Tax System" means? So, I suppose multiple countries are committed to an intergovernmental pact to organize a globalized version of IRS?

Native speaker’s answer
Rebecca
I believe it refers to how different tax systems work in different countries, which probably have to keep track of to make sure everyone complies. So, even if countries have different systems, with so much travel and immigration, they probably have to have policies in place to maintain it. Ex: If I teach English overseas, I still have to make sure I'm paying tax to my country. Ex: Do you know what the international tax policies are with immigrating and working remotely?