deduction

详细解释:n. 减除, 扣除, 减除额, 推论
【医】 演绎, 推论
【经】 减除数, 扣除额, 折扣额

英语解释：

名词 deduction:

a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket同义词：tax write-off, tax deduction