Code DD in box 12 of your husband's W-2 is the total that his employer and he through payroll deduction paid towards his health insurance premiums. This has nothing to do with his HSA (although they are probably the premiums for the HDHP).
It's quite likely that his W-2 is correct if no contributions were made to his HSA, so he probably does not need a corrected W-2.
The IRS says that if you made no contributions to or took distributions from your HSA, then you do not even need to file the form 8889. This sounds like your husband's situation.
In this case, you should not have even told TurboTax that he had an HSA. Yes, I know that's confusing. but most taxpayers with an HSA do one or the other, not no transactions during the tax year at all.
So, if indeed your husband made no contributions to the HSA nor took any distributions from the HSA and did not have a carryover of excess HSA contributions form the previous year, then let's just delete everything you have entered related to his HSA.
The best way to do this is:
NOTE: if you see a question "What type of High Deductible Health Plan did you have any December 1, 2018?" (yes, 2018), be sure to answer "NONE".
1. make a copy of your W-2(s) (if you don't have the paper copies)
2. delete your W-2(s) (use the garbage can icon next to the W-2(s) on the Income screen
*** Desktop***
3. go to View (at the top), choose Forms, and select the desired form. Note the Delete Form button at the bottom of the screen.
*** Online ***
3. go to Tax Tools (on the left), and navigate to Tools->Delete a form
4. delete form(s) 1099-SA (if one), 8889-T, and 8889-S (if one)
5. go back and re-add your W-2(s), preferably adding them manually
6. continue with your return.
Do this in future years as well, until he has money going into or out of the HSA.
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