How to data-enter return of excess 401(k) contribution?

[tacks_is_hard]

I am trying to finish my taxes with TurboTax. In 2024 I made an excess contribution to my 401(k) which was returned to me in 2025. I will receive a 2025 1099-R with code P. I do not currently have that form. It will not be sent to me until 2026.

The TurboTax forums suggest I should report the returned excess amount as “less common income” for which a W-2 or 1099 was not issued (this is fine and I can do this).

However, the TurboTax product shows help text that states I should enter the 2025 1099-R as if it exists:

“Report the excess deferral on your 2024 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 2025 Form 1099-R.”

I do not have the EIN or payer address that would appear on the 1099-R and TurboTax will not accept blank fields.

What is the correct treatment? Does it matter? And if I need to report a 1099-R that I don’t have yet, how do I get around the EIN/address validation?

[MinhT1]

You do not need to create a 2025 form 1099-R. 

Any earnings on the excess deferrals will be covered by a 1099-R for 2025 and will be entered then as a normal 1099-R on your 2025 tax return.

Below is how to report your 401(k) excess deferrals in TurboTax Online:

1. Click on Federal in the left-hand column, then on Wages & Income
2. Navigate to the list of income categories
3. Locate the section Less Common Income
4. Select Miscellaneous Income and click Start
5. Select Other income not already reported on a Form W-2 or Form 1099 and click on Start
6. Answer the question "Did you receive any other wages?  Yes
7. Click through the questions till you get to Any Other Earned Income
8. Answer Yes to Did you earn any other wages?
9. Indicate Other as Source of Other Earned Income and click Continue
10. For the description enter "2024 Excess 401K Deferrals" and click on Done