去argue一下吧，你公司完全错误！

How long do I have to use my 2020 or 2021 FSA contributions?

With the temporary removal of the maximum limit on the FSA rollover, FSA members can carryover all unused balances from 2020 to 2021 and from 2021 to 2022.

随便的一个网站就有这个信息。

https://www.mccs.me.edu/wp-content/uploads/Flexible-Spending-Account-2021-Temp-Provisions-QA.pdf [ 链接：www.mccs.me.edu/wp-content/uploads/Flexible-Spending-Account-2021-Temp-Provisions-QA.pdf ]