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