To clarify, do you want instructions on how to input Form 1098 in TurboTax? If yes, then please follow the steps below:
1) Open your Return and click on Tax Home from the Left Menu.
2) On the main screen, please click on Deductions & Credits.
3) Scroll Down and you will see a section for "Your Home". Click on that.
4) The first option you should see is Mortgage Interest and Refinancing (Form 1098), Click Start next to it and you can enter the information.
Please visit Mortgage Interest Deduction for more information.