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