If i paid into a 401k at work is this amount deductible

[ChristinaS · Accepted solution]

Yes (and no).

It is tax deductible, but this benefit has already been built into your W2. Your box 1 W2 taxable wages already reflect a tax deduction. You simply enter your W2.

You don't input 401k contributions on your tax return anywhere else other than by typing in your W2.