Since you are an employee of the company, you do not report the employer contribution anywhere on your personal income tax return. Your employer gets the deduction for the employer contribution, not you. The only benefit that you get on your personal income tax return is from your own elective deferrals to the SIMPLE IRA plan by your employer reducing the amount that your employer reports in box 1 of your W-2 by the amount of your elective deferrals that your employer reports with code S in box 12 of your W-2. Enter amounts shown on your W-2 only on TurboTax's W-2 form.
Your tax return should have nothing on Form 1040 line 28 and you should have no entries on the Keogh, SEP, and SIMPLE Contribution Worksheet. Switch to forms mode and delete the Keogh/SEP Wks. The Keogh/SEP Wks is only for use by someone who is self-employed or a partners in a partnership.
