I'm so sorry. There is no charge until you've e-filed. You can simply abandon the return as it is.
If you'd like to remove the information you've entered, you can use the "Clear and Start Over" feature. See instructions for this in the TurboTax FAQ linked below.
How do I clear and start over in TurboTax Online?
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***
