It is not interest.
You would report this as miscellaneous income.
In TurboTax, Click on the following tabs:
- Federal Taxes
- Wages & Income
- Scroll down to Less Common Income (you may have to click "Show more" to expand this category
- Miscellaneous Income, 1099-A, 1099-C
- To the right of this category click Start
- Scroll down to Other Reportable Income
- To the right of this category click Start
