Definition (金钱)
to acknowledge that money is unrecoverable, or a debt will remain unpaid
销帐（债务）
Due to the company's bankruptcy, we had to write off the debt.
由于公司破产，我们不得不销账这笔债务。
During the audit, they discovered missing amounts that needed to be written off.
在审计过程中，他们发现需要销账的缺失金额。
If recovery is unlikely, it’s best to write it off as soon as possible.
如果收回的可能性很小，最好尽快销账。
to claim the expense of a purchase to lower the tax owed
将购买成本抵扣税款
He wrote off the cost of office upgrades to reduce his tax liability.
他将办公室升级的费用抵扣税款，以减少应缴税额。
At the end of the year, we will ensure all legitimate expenses can be written off.
在年底，我们将确保所有合法费用都可以抵扣。
She wrote off the expense of the computer equipment she purchased, saving a significant amount in taxes.
她将购买电脑设备的费用抵扣，节省了大量的税款。