Tax Residency Primer orients users on their tax-residency situation after moving countries by outlining the questions that determine where tax is owed, highlighting dual-residency and double-taxation traps, and establishing a document checklist. It helps users structure a productive conversation with a qualified cross-border tax professional rather than providing DIY tax advice or filings. Use it when someone asks whether they are a tax resident in a specific country, wonders about paying tax in two countries, or needs help navigating mid-year international moves. It produces a residency-question map, a trap list, a fact pack checklist, and specific questions for an adviser.