If you have not yet filed your returns and you have not yet paid, you do not have to do anything else if you do not wish to use TurboTax to prepare your taxes.
If you wish to clear out information that you have already entered for security purposes, you can do the following steps:
1.) On the left-hand side of your return, click Tax Tools
2.) Click Clear and Start Over
Please note, this will erase all data that you have entered and it cannot be recovered.