topic 401k w2 box 12 code D in Retirement tax questions

401k w2 box 12 code D

ds1876 — Wed, 11 Feb 2026 10:48:15 GMT

When I input my 401K contributions into TurboTax Premier desktop in the W2 box 12 code D section

it does not Chage my taxes owed.

why?

Re: 401k w2 box 12 code D

DoninGA — Thu, 10 Oct 2024 19:39:08 GMT

Contributions to an employer sponsored 401(k) are not reported on a tax return. They are pre-tax contributions.

Re: 401k w2 box 12 code D

VolvoGirl — Thu, 10 Oct 2024 19:52:33 GMT

401K code D. It comes out of your checks pretax and has already been deducted from the wages in box 1 and you can't deduct it again. Notice that box 1 should be less than boxes 3&5.

Re: 401k w2 box 12 code D

SteamTrain — Thu, 10 Oct 2024 20:54:46 GMT

The value in box 12, code D, just defines how much of the wage difference for box 1 was from pre-tax 401k contributions.