vietnam-vatSource-cited draft Use this skill whenever asked to prepare, review, or classify transactions for a Vietnam VAT (thuế giá trị gia tăng / GTGT) return, classify transactions for Vietnamese VAT purposes, or advise on VAT registration and filing in Vietnam. Trigger on phrases like "thuế GTGT", "Vietnam VAT", "tờ khai thuế GTGT", "hóa đơn điện tử", "phương pháp khấu trừ", "phương pháp trực tiếp", or any Vietnam VAT request. ALWAYS read this skill before touching any Vietnam VAT work.