Excess 401K ROTH contribution

Hello,

I changed employers in 2021 and overcontributed to my Fidelity ROTH 401K by $3000. I found this recently while preparing my tax returns. Company says it is too late to write a check returning the amount. What are my next steps?

1. Fill the ROE form from Fidelity (https://workplaceservices.fidelity.com/bin-public/070_NB_PreLogin_Pages/documents/ReturnofExcessCont...)

2. How do I estimate interest accrued on the excess contribution and do I need to show that?

3. How do I modify my return to account for this?

Appreciate any help I can get.

 

Thanks,

Shringi