If you are using the TurboTax Online product, you may Clear & Start Over.
If you are using the TurboTax CD/Download product, you may delete the tax data file(s) (.tax2017) you created. In order to find the tax data files on your computer, please refer to the following TurboTax FAQs depending on the product you used:
If you need to amend tax returns you already filed, you may follow the instructions on the following TurboTax FAQ depending on the product you used when you originally filed your tax returns: How to amend (change or correct) a return you already filed?
