When you save your information in the CD/download edition of TurboTax for tax year 2018, the information is stored in a file with the extension tt18. For example, if John Doe uses TurboTax to complete his 2018 tax return, his information is saved in the John.tt18 file.
Similarly, if John enters only some of his tax information and intends to complete his tax return later, when he saves his information before closing TurboTax, the information is stored in the John.tt18 file.
In other words, after you enter your information in TurboTax and save it, TurboTax creates a file on your computer with the extension ttYY, where YY represents the last two digits of the tax year. We refer to this file as the tax data file.
(For printing and future reference, consider saving a PDF copy of your tax return).
Name of your tax data file
Individual tax returns: By default, TurboTax names your tax data file using your first name, based on the information that you entered in your tax return. For example, for tax year 2017, if John Doe saves his tax return using the default name chosen by TurboTax, the tax data file is named John.tt17.
Coupled tax returns: For married or common-law couples who are filing a joint or coupled return, the default file name is made up of each individual's first name connected by '&'. So, if John Doe is married or in a common-law partnership with Jane Smith and they are filing a coupled or joint return, if they save their tax return using the default name chosen by TurboTax, the tax data file is named John&Jane.tt17.
Location of your tax data file
By default, TurboTax saves your tax data files to the following location:
C:\Users\<user_name>\Documents\TurboTax\<YYYY>, where <user_name> is your Windows user name and <YYYY> represents the tax year.
For example, John Doe's Windows user name is jdoe and he's looking for his 2016 tax return. If he saved his tax return to the default location, it will be located at C:\Users\jdoe\Documents\TurboTax\2016.
Tax data files from tax year 2009 or prior
Before tax year 2010, TurboTax was called QuickTax. Tax returns created in QuickTax for tax year 2009 or prior years were saved in tax data files with the extension qYY, where YY represents the last two digits of the tax year.
For example, for tax year 2008, the tax data file extension is q08.