你的administrator可以退給你。

https://www.nerdwallet.com/article/investing/excess-401k-contribution-what-to-do#:~:text=The%20plan%20administrator%20is%20required,be%20slow%20about%20doing%20this.

 

By the way, IRAs deadlines are 4/18/23.  401K deadline is 12/31/2022.