今天收到一封CRA的一封来信,来信的内容是"We cannot calculate the amount of the GST/HSTC to which you maybe entitled for July 2015 to April 2016. If you provide the following information, will process it and inform you the result: -your world income, with the amount converted to Canadian dollars, for the period in 2014 before you came to Canada" 4 P* M6 } H0 z+ u* B) [ 7 B$ x8 _+ |7 F* W' v$ T+ z3 b+ F去年九月份我才来屯里留学的,之前一直在国内上班,应该有5万左右(人民币)的工资。我需要如何回复他们?可以直接在CRA的网上账户操作么?还是必须通过别的方法(寄信,传真或者打电话)跟他们联系?