A "connection" between a business and a state that triggers tax obligations. For remote H1B workers, "Nexus" is often created in the state where the employee physically sits, even if the company is in another state.
Report of Foreign Bank and Financial Accounts. Required if the total of all foreign accounts exceeds $10,000 at any time during the calendar year. Non-willful penalties start at $10,000.
A tax processing number issued by the IRS for those who are not eligible for a Social Security Number (SSN), often used by foreign founders and dependents.
The formula the IRS uses to determine if a non-citizen is a "Resident Alien" for tax purposes. Usually involves being in the US for at least 31 days in the current year and 183 days over a 3-year period.
