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