You can report this under the interest section under Interest from Seller-financed loan. (I am sorry for your loss.)
To enter interest income
information in TurboTax, log into your tax return (for TurboTax Online sign-in,
click Here and click on "Take
me to my return") type "1099int"
in the search bar then select "jump to
1099int". TurboTax will guide you in entering this information.