How to remove your TurboTax account
On their site, after searching a bit, you can read it’s impossible to delete an account. (Source: http://turbotax.intuit.com/support/iq/Multiple-Accounts/Problems-associated-with-multiple-TurboTax-accounts/GEN21940.html )
So, with all these possibly filled in personal (and financial) data, that doesn’t sound too good. Advice: delete and obfuscate as much as possible from your account page (log in here: https://qtwu1.qprd.turbotaxonline.intuit.com/turbotax/ttonline.htm and at least delete forms, if necessary; on your right you can change personal data). If you’re still no happy customer, let them know and request removal anyway: https://turbotax.intuit.com/support/contact/index.jsp
Helpful Trick: Obfuscate your profile info.
Because most accounts and profiles at TurboTax cannot be removed, we suggest you login and change your account and profile information altogether.
Make sure you are logged in to your account on the site and click on the profile or options settings. Locate the fields with your personal info (email, name, address) and fill in generic, random information instead. If you can only select from several fields, change anything personally identifying. If possible, use a homepage/URL field or long text field (such as Description) and put this line in it: http://remove.org/removal-requested. This may encourage webmasters and admins to create an easier removal outlet.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for TurboTax using a third-party login such as Facebook or Twitter, you probably want to revoke all access from TurboTax. Click here to find out how.