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