Mortgage information is entered on Form 1098, in TurboTax - please follow these steps to delete:

• In your return, Click on Federal Taxes
• Click on Deductions & Credits
• Under "Your tax breaks", click on Edit/Add button for Mortgage Interest, Refinancing, and Insurance
• On "Mortgage deduction summary" page, click on trash can to the right of the Mortgage Lender which you wish to remove
• Click on "Yes" button in answer to the question, "Are you sure you want to delete this lender?"
• Mortgage lender is deleted

Or, 

To remove the reference to home mortgage interest on your return, please follow these steps:

1. Click on Federal > Deductions & Credits.
2. In the Your Home section, click on the Start/Revisit box next to Mortgage Interest, Refinancing, and Insurance.  [See Screenshot, below.)
3. Click Trashcan. Confirm deletion.

Here's the general procedure for deleting unwanted forms, schedules, and worksheets in TurboTax Online:

1. Open your return in TurboTax. (To do this, sign in to TurboTax, and select the Take me to my return button.)
2. In the left side bar, select Tax Tools> Tools.
3. In the pop-up window Tool Center, choose Delete a form.
4. Select Delete next to the form/schedule/worksheet (Form 1098)and follow the onscreen instructions.