If you need to reissue or cancel a tax invoice, you can do so through the National Tax Service website. Follow the steps below: Login to the Home Tax홈택스 로그인 Inquiry/Issuance 조회/발급 Electronic Tax Invoice 전자세금계산서 Issuance 발급 Revised Issuance 수정발급 Tax Invoice 세금계산서 Select the original issuance 당초 발급분 선택 If you follow the above menu, you will be prompted to select a method for creating a revised ele..