I Contributed $ 7300 to HSA as a pre Tax deduction coded as W for Box 12 on the W2. I type it on Turbo tax but it does not lower my Federal nor state income tax. Why?

I Contributed  $ 7300 to HSA  as a pre Tax deduction coded as W for Box 12 on the W2.  I type it on Turbo tax but it does not lower my Federal nor state income tax. Why?