Check to see if you entered W-2, Box 12, D : Contributions to your 401(k) plan instead of DD: Cost of employer-sponsored health coverage. 

To remove a form in TurboTax Online, see How do I view and delete forms in TurboTax Online?

To remove a form in TurboTax CD\Download, see How do I delete a tax form in the TurboTax CD/Download software?

$6,000 is the contribution limit for an IRA contribution for someone under age 50, so check to see if you entered an IRA contribution under Deductions & Credits.  If you made no traditional or Roth IRA contribution for 2019 and the IRA Contribution Worksheet is present, delete the IRA Contribution Worksheet.