Where do I report interest payments received from an installment sale that my mom was receiving but I now have inherited?

My mother had sold a rental property several years ago on contract and was receiving payments. She recently passed away and I am now receiving the monthly payments. 

The instructions for Schedule B say to use schedule B if, “You received interest from a seller-financed mortgage and the buyer used the property as a personal residence.” 

This is a rental property and was not used as a personal residence. 

Where do I report the interest received?