關於「Federal tax ID」標籤，搜尋引擎有相關的訊息討論：

What is a federal tax ID number? - Wolters Kluwerwww.wolterskluwer.com › Home › Expert InsightsTaxpayer identification numbers (TIN) | Internal Revenue Servicewww.irs.gov › individuals › international-taxpayers › taxp...Tax ID Number (TIN) Definition & Formats Around the Wo