Employer contributions are not reportable on your tax return.
Enter amounts shown in box 12 of your W-2 only in box 12 of TurboTax's W-2 form, nowhere else in TurboTax.
While it's possible to have your employer deposit part of your pay reported to you in box 1 of your W-2 into a traditional IRA as a convenience to you, the same as if the money was given to you on your paycheck and you contributed the money yourself, the retirement contributions are likely not such contributions and are not reportable anywhere under Deductions & Credits.
