On your W-2, the Box 12 code W amount includes both the employer and employee pre-tax contributions, including incentives. If you contributed to your HSA through payroll deductions, do not enter them anywhere else in TurboTax.
On your HSA summary page, you will see Tax-free employer contributions, but it means both employer and employee contributions in total. It is just how the IRS codes it (code W).
If you used the funds for medical expenses, you should receive a Form 1099-SA. Enter this form in TurboTax for distributions.
**Say "Thanks" by clicking the thumb icon in a post. **Mark the post that answers your question by clicking on "Mark as Best Answer"