You'd treat it just like it was another mortgage.
In Turbo Tax Deluxe:
1. Sign in to Turbo Tax.
2. Go to Deductions & Credits.
3. Select I'll choose what I work on.
5. Click Start or Update by Mortgage Interest, Refinancing, and Insurance.
6. Type your Lender Name when you get to that screen.
8. Continue through till you get back to the Deductions & Credits menu.