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