You will report the mortgage interest from this "seller-financed" loan under "Deductions & Credits" section of your personal information/"Your Home"/"Mortgage Interest Refinancing, and Insurance". After clicking "Start" follow the program prompts to enter the information (lender's name). On the next page, choose "This is a sell-financed loan and I did not receive a 1098" (see attached screenshot). The program will ask for the lender's address and social security number, which you'll need in order to complete this entry.
Please comment if you need additional help with this.
