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