READ that answer again ... the HSA was not included in boxes 1, 3 & 5 ... it was only entered in box 12 as a code W. For the 401K only box 1 is reduced and not 3 & 5. If you don't understand the W-2 ask the employer to explain it to you before you do something incorrect on the return.
ALL contributions the HSA thru the payroll system (both employee and employer) are listed on the W-2 box 12 code W ... do NOT try to enter them anywhere else in the program or the IRS will send you an audit letter later.
The HSA is handled in 3 parts in the TT program :
First the contribution:
https://ttlc.intuit.com/replies/4557768
https://ttlc.intuit.com/replies/4785646
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.
https://ttlc.intuit.com/replies/4788059
And lastly any distribution:
https://ttlc.intuit.com/replies/4787864
