원고는 2013. 7. 20. 소득월액보험료의 부과기준이 되는 소득이 변동되었다며 피고에게 국세청으로부터 발급받은 2012년도 소득금액증명을 제출하여 수시조정을 신청하였다.
On July 20, 2013, the Plaintiff submitted a certificate of income amount issued by the National Tax Service for 2012 to apply for occasional adjustment to the Defendant, saying that the income on which the monthly income premium was imposed had changed.