This is related to your job-related expenses.
To get back to that section follow the below instructions and answer any questions related that haven't been answered yet.
- Sign in to TurboTax and choose take me to my return
- Type 2106 in the search bar in the upper right hand of your screen and hit Enter
- Click on Jump to 2106
- You should land on your Job-Related Expenses Summary
- Click Edit next to the one with the error and go back thru the questions until you reach the end of the section.
- If you see that you have one listed in error, you can delete it at the job-related expenses summary screen.