I cannot file because I cannot delete Form 8936

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

1. Open your return in TurboTax. (To do this, sign in to TurboTax, and select Take me to my return.)
2. In the left-side menu, 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 in the list and follow the onscreen instructions.