Retirement tax questions

Thanks a lot MinhT1 for your quick response!

 

So, I only have to add excess contribution ($19500 in my case) as part of Wages..and I don't need to request new W2 with amendment to my former employer...the gains I had from excess contribution will be added during 2022 tax filing next year (in 2023)...Is my understanding correct?

 

Really appreciate your help!

 

Thank you!