Excess HSA contribution incorrect

"since I continued on a high deductible health plan," - so you did not go on any form of Medicare?

What is the error on your return?

You should not ask for the withdrawal of excess HSA contributions if you didn't actually have any excess. It is difficult for taxpayers to calculate the annual HSA contribution limit so it's good to let TurboTax tell you what the excess is.

How did you get an amount into line 12B if you never had an excess?

Never mind, please do an HSA Reset to remove all HSA data from your return so you can start the HSA interview over from scratch.

HSA RESET

***Reset***

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/Windows***

3. Go to the upper right and click on Forms, and 

4. Select the desired form(s) (1099-SA (if one), 8889-T, and 8889-S (if one)). Note the Delete Form button at the bottom of the form’s screen.

*** Desktop/Mac***

3. Switch to Forms Mode by selecting the Forms icon.

4. From the menu, select the form(s) (1099-SA (if one), 8889-T, and 8889-S (if one)) you want to remove (if you don't see it, select Open Form at the top). From the Forms menu, select Remove [form name].

*** 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. go back and redo the entire HSA interview....