You should report the excess contributions on Line 1 of your 2018 Tax Return by following these steps:
- Login to your TurboTax Online Account
- Click "Take Me to My Return"
- Click "Federal" from the left side of your screen
- Scroll down to "Less Common Income" and click "Show More"
- Select "Miscellaneous Income" and click Start or Update
- Select "Other income not already reported on a Form W-2 or Form 1099" and click on Start
- Answer the Question "Did you receive any other wages? Yes
- Click "Continue" through the questions until you get to "Any Other Earned Income"
- Answer "Yes" to "Did you earn any other wages?
- Indicate "Other" as Source of Other Earned Income and click Continue
- For the description enter "2018 Excess 401K Deferrals" and click on Done
You will receive a 2019 Form 1099-R in 2020 showing the refund with a code "P" in box 7 which you can ignore if the excess deferral is reported as suggested above. However, the earnings will be reported on a separate 2019 Form 1099-R with a Code "8" in Box 7 that should be reported on your 2019 tax return.
