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