Casualty and theft loss is reported on Form 4684. 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 and follow the onscreen instructions.