overstay clearance Korea korea mobile internet visa violation travel korea Myeongdong tax kiosk visa-free Korea VAT refund Korea Incheon Airport to Seoul visa free korea late night bus Korea airport bus Seoul Incheon Airport to Seoul after midnight 한국 세금 환급 Korea tourist visa korea sim card tourist exit procedures Korea tourist visa rules korea illegal work tourist korea immigration risk Tax refund in Korea immigration overstay decision Korea tourist rules Korea tourist medical emergency Korea tourist entry denial korea Incheon Airport late night transportation 외국인 택스 리펀 tourist exit record Korea missed last subway Korea taxi Incheon Airport korea travel tips hospital visit tourist Korea esim korea Korea travel guide AREX Korea travel Korea night transportation Korea late arrival Seoul 공항 환급 방법 tourist overstay Korea consequences Korea tax refund travel to korea overstay Korea k-eta korea Korea night bus airport overstay exit risk Korea korea entry requirements airport transportation Korea taxi at night Korea korea tourism guide korea connectivity 서울 쇼핑 환급