In 2021 the form was updated; you may simply enter this information on Sch 1 line 8c.
The UltimateTax program does not have a 1099-C. Cancellation of debt income has many factors that contribute to whether or not the income is taxable. Due to this, Form 1099-C for cancellation of debt is not currently in the UltimateTax system. If you need to enter this information into a return, you will enter that information on the Sch 1 line 8.
To do this, you will link the 1040 worksheet 7 to line 8, which says other income. To link the form, click on the line, press F9, or right-click and choose the link.
Enter in information on 1040 worksheet 7. It will automatically carry over to the Sch 1 line 8. You will notice that there is no line for 1099-C information. You will need to use one of the description lines (17-30) and enter something along the lines of "1099-C" or "Cancellation of debt."
You can also use form 982 to enter this information. Whichever applies to the return in question.