I accidentally added in an amount as a HSA contribution and I cannot figure out how to remove it. Do you know how to remove that item?

Yes, if you entered an amount directly into the HSA contribution section, here is how to navigate back to it and fix it in TurboTax online:

1. Click on Federal Taxes,  Deduction & Credits
2. Choose "add/edit" HSA, MSA Contributions
3. You will see a page titled "Your HSA Summary" which will show any deductions already computed from your W-2  
4. Choose Edit, Check the box for HSA, Continue
5. You'll now see a screen that says "Here's what we have so far"
6. Choose done and continue until you get to a screen that says "Let's enter your HSA contributions"
7. In the box "Any contributions you personally made (not through your employer)" you can adjust as necessary.

If there was an error in the W-2 HSA deductions (summary from Step 3 above), revisit your W-2 input. ‌Here's how to do that in TurboTax Online:

1. Navigate to Federal Taxes,  Wages & Income,  Job (W-2),  Add/Edit
2. On the next page select the W-2 has the local tax showing up on state, using the pencil icon
3. Continue through information about company
4. Then, correct the HSA entry located in Box 12, Code W on the screen "Now let's update the rest"