Did you do this:
In the TurboTax search box, enter 1099-c and press Enter,
Then click on the Jump to 1099-c link.
On the Tell Us About Your Canceled Debt screen, answer the questions about your form and follow the interviews.
A creditor's name is not required when entering a Form 1099-C into the TurboTax program. You only enter the cancelled debt amount, interest and if for a personal residence the Fair Market Value. You should also have indicated that Debtor was personally liable for repayment of the debt when entering a 1099-C for a personal residence.
You must have followed this procedure in the TurboTax program to report the Form 1099-C
On the next screen, on Cancellation of debt (Form 1099-C)...click the start or update button
The cancelled debt amount for personal debt would have been entered on Line 21 of Form 1040 as Cancelled Debt Income.