Contributions to an HSA for the year or distributions from an HSA during the year require filing Form 8889. The Federal Free version of TurboTax does not support filing Form 8889. Whether reasonable or not, this is a business decision that Intuit has made.
If you have an HSA with an existing balance but made no contributions for or distributions during the year, your tax return would not include Form 8889.
[Edit: corrected to refer to Form 8889 instead of Form 8880]
