I am only a sales assistant for the shop, and the shop owner will deduct 50 yuan from my salary when I do not get an excellent comment from customers.

我只不过是这个店铺的销售员，如果我不能从顾客那里得到一个优秀的评价的话，店主就会从我的工资里面扣除50块。

youdao

In cases the offender denies responsibility, the organs making the ruling shall notify his work unit to deduct the reparations from his salary or retain his property to be converted into payment.

拒不交纳的，由裁决机关通知其所在单位从本人工资中扣除，或者扣押财物折抵。

youdao

If you work in a company, you usually don't have to go to the tax bureau because your company will deduct it from your salary.

如果你在公司里工作，你不用自己去税务局交税。你的公司会从你的工资中扣除你的所得税。

youdao

If your business is incorporated, you can deduct the salary deferral from W-2 earnings and the employer contribution as a business expense.

WSJ: Conquering Retirement; Savings Plans for the Self-Employed