Confusion about excess 401k contribution

[BlackJack96]

I have regular job where I max out my 403b contribution. I have a moonlighting gig where I work sporadically. Unbeknownst to me, they auto-enrolled me in their 401k plan so because of this I have @$341 in excess contributions for 2022. I just discovered this (didn't look at w2 until yesterday when I started taxes). I called the plan and they said they could send me the money, etc, etc. I'm assuming I'll get a 1099-R in 2024 for TY2023 for the income.

Turbo Tax alerted me to the excess contribution and said:

"1. Report the excess deferral on your 2022 return in the Income section for Retirement Plans and Social Security whether or not you received a Form 1099-R before you file your return. Enter as much information as you can. Report the excess deferral amount in boxes 1 and 2a, and use code P in box 7. Indicate that this is a 2023 Form 1099-R.

2. In 2023, you will probably receive two Forms 1099-R. One reports the excess deferral amount. The other reports the earnings on the excess deferral. Enter both of these forms in your 2023 return, and we'll only add the earnings to your 2023 income."

I'm a little uncomfortable making up a 1099 for 2022. Can't I just wait until next year and report the income in TY2023 using the 1099-R. Do I need to make up the 1099 with code P and all that for TY2022? 

[DaveF1006 · Accepted solution]

No, you can wait until 2024 when the 1099R's are issued. Preparing a mock 1099R this year is only an option. 

[BlackJack96]

Thanks! If I wait until 2024 will I have to amend my TY2022 tax return?

[MinhT1]

No as you have already reported your excess contribution in income in your 2022 tax return,

[BlackJack96]

I didn't report it as income. I filled out the W2 info which shows I over contributed. Where should I report the additional income?

[MaryK4]

Yes, you will have to amend your 2022 tax return next year.  You will follow the exact directions as above.  @BlackJack96