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