HSA entry increases tax

In turbtax why is my taxes owed increasing when I enter box 12 on my w2?  Here are some of the details:

1. your HDHP coverage (Family or Self)- Self

2. your spouse's HDHP coverage - None he has traditional health insurance

3. your code W amount on the W-2 $3550

4. your spouse's code W on the W-2 none

5. your direct contributions to the HSA (not through the employer) $0

6. your spouse's contributions to the HSA (not through the employer) $0

7. any carryover of excess contribution from 2017 for either of you $0