You must enter the Form W-2 that you receive exactly as the form is provided. If it has Box 13 Retirement plan marked, you must have that box marked on TurboTax's W-2 form. When checking your tax return for accuracy, the IRS goes by the marking on the Form W-2 that the employer provides to you and to the IRS.
If box 13 Retirement plan is marked inappropriately on the Form W-2 that you receive from the employer, you must get the employer to provide a corrected W-2.
