We know an enormous amount of PI was leaked from various major breaches last year, if that is what happening TurboTax is really just a tool being exploited for profit.
[1] http://time.com/money/3419136/identity-theft-social-security...
HR Block was caught lobbying against simplification of the tax system for this very reason.
I'm sure people would be very happy to not have to file tax returns.
Eliminate advance tax withholding and pay all taxes in arrears with allowance for a no-penalty payment plan for up to one year after the end of the tax year. You have significant one-time cost from shifting obligations forward, and a bit of an ongoing cost from the time value of money, but you eliminate the problem of fraudulent refunds by simply eliminating routine refunds.
As others pointed out, it does look like one of those two entities above were breached, as data filed in forms is very similar to data from 2013.