Your scenario sounds like a wrap-around (assuming the lender has assented) which TurboTax does not handle well.
The transaction would typically be entered as an installment sale and the home sale exclusion needs to be addressed if you otherwise qualify.
Further, you would enter any interest you paid as an itemized deduction if you, in fact, itemize.
You might want to run this past Support.
How do I contact TurboTax? (intuit.com)
