发票校验码后六位在哪
发票检验码会在开具发票的备注栏次体现，发票校验码后六位就是在备注栏找到发票检验码，对这个发票检验码从后往前数6位数，这个就是发票校验码后六位的数字。增值税普通发票可以用校验码查询发票的真伪。
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