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…
Another file sharing site without account deletion option. Contact them using the ticket system: http://support.turbobit.net/index.php?/Tickets/Submit Include your account…