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