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