The US is one of the only countries to require its citizens and permanent residents (i.e., green card holders) to file annual tax returns and report their worldwide income, regardless of their actual work location. When working outside the United States, it is often the case that US persons are subject to taxation in the county where they are physically located.
Looking for something specific?
One of the most unpleasant surprises a global mobility manager may encounter is receiving an unexpected request to pay a large tax payment on behalf of a tax equalized assignee. With the right tax accrual process in place, you can avoid those unpleasant tax payment surprises.