I'm not sure you are talking about a schedule C here. You probably have a form 1099-C for cancellation of debt. Those forms are entered in the "Wages & Income" tab.
Scroll down to "Less common income"
"Show More"
"Start/Revisit" the "Miscellaneous Income...1099C" topic
"Start/Revisit" the "Cancellation of debt (form 1099C)..." topic
A schedule C is used to report income and expenses for a business or self-employment endeavor you own.
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