On the W-2 in box 12 the HSA contributions are listed as code W and that amount is not in box 1 already so you don't get to deduct them again ... follow the program instructions carefully.
The HSA is handled in 3 parts in the TT program :
First the contribution:
Next the limitations screen to confirm you are eligible to make the contributions:
Until you complete the HSA portion of the TurboTax interview to establish your eligibility for an HSA contribution, TurboTax will treat the amount entered on the W-2 form as an excess HSA contribution.
And lastly any distribution:
Employer contributions are listed on line 9, and limit the deductibility of contributions you make separately which are listed on line 1. You should not be entering employer/employee contributions separately when the program asks for "additional" or outside contributions.
Under the tax code, any payroll contributions are considered "employer" contributions because you enter into an agreement with your employer to reduce your salary and your employer makes the contribution.