There is only one file type that uses the .TT2012STATE extension:
TurboTax 2012 State Tax Form
State tax form used by TurboTax, a program used for completing United States tax returns; contains a tax form for an individual state and is used when filing a state tax return.
State tax forms are not included with TurboTax. Instead, they are automatically downloaded when you begin a specific state return. A free state return is included with TurboTax Deluxe, Premier, and Home & Business editions.
Updated: October 20, 2012