For 2025, the contribution limits to a 457(b) plan are $23,500. There is an additional $7,500 catch-up contributions for those over age 50 and a super catch-up of $11,250 for those who are aged 60 to 63.
When entering your W-2 in TurboTax, the contributions to the 457(b) plan will either appear in Box 12 with a code G for Elective Deferrals to a 457(b) or code EE for Roth contributions to a 457(b) plan. After entering your W-2, you will click through screens until you get to a screen "We need a little more info about box 12". The question will ask if your employer is a state or local government - if yes, it will ask if you elected to have your employer make contributions to your deferred compensation plan. If answering no here, that would trigger an excess contribution warning for the 457(b)
An excess IRA contribution would be if you had contributed to a traditional or Roth IRA account, but were ineligible because of income and/or because you were covered by the 457(b) at your workplace.
If you could provide more information about whether this is an excess IRA or excess 457(b) contribution, that would be helpful in getting a correct response to you.
[Edited 2/12/2026, 11:46 AM PST] @shiv360
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