You may have inadvertently responded to a prompt in the TurboTax interview that generated this problem. To get past it in TurboTax Online:
I followed all the steps and it still didnt work. Is there something else I can do?
Next, I would like for you to try to delete the form that records this answer - Schedule B. To do that follow these steps in TurboTax Online:
Next, clear the cache and cookies from your browser's settings (Ctrl+shift+delete in Chrome)
Finally, close your browser, re-open and then log back into TurboTax and see if this will clear that error for you.