There is no income limit affecting eligibility to make contributions to employer-provided retirement plans.
https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-401k-and-profit-sha...
Enter amounts in box 12 of your W-2 only in box 12 of TurboTax's W-2 from, nowhere else in TurboTax. A 401(k) is not an IRA.
