I havent completed filing yet and i want to clear and start over

Go back and edit the information you have entered section by section by clicking on the top navigation bar

You can use the Clear and Start Over Feature to erase and start your return over as long as you have not submitted payment, deducted the TurboTax fee from your refund, or registered.

Please see the Turbo Tax FAQ How do I clear and start over in TurboTax Online? for instructions.