If you have not yet mailed in your return then you are in the clear and no information has been transmitted to the IRS.TurboTax does not offer the cancel an account option, but you are able to remove all personal information off of our program.Once your in your return choose My Account at the top of the page then select Clear and Start Over.Choosing this option will remove all pieces of personal and tax information out of the TurboTax program.