TurboTax does not calculate any penalties for contributions to a 401(k). You have mistakenly entered your 401(k) elective deferrals as IRA contributions.
A 401(k) is not an IRA. Enter amounts shown in box 12 of your W-2 only in box 12 of TurboTax's W-2 form, nowhere else in TurboTax. Go back and remove the mistaken entry you made under Deductions & Credits.