Here are the steps for deleting unwanted forms in TurboTax Online:

Open your return in TurboTax. (To do this, sign in to TurboTax, and select the Take me to my return button.)

In the left side bar, select Tax Tools> Tools.

In the pop-up window Tool Center, choose Delete a form.

Select Delete next to the form/schedule/worksheet and follow the onscreen instructions.