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