.TAX File Extension
TurboTax Tax Return
| Developer | Intuit |
| Popularity |
2.0 | 14 Votes |
What is a TAX file?
A TAX file is a tax return created by older versions of Intuit TurboTax, a tax preparation application used to prepare and file U.S. federal and state income tax returns. It stores the financial and personal information entered while completing a return, along with calculated tax values and the data needed to populate official tax forms. TAX files allow users to save their progress and continue working on a return before filing.
More Information
Modern versions of TurboTax save returns with the software version appended to the .tax file extension. For example, TurboTax 2025 saves returns as .TAX2025 files. While modern versions no longer save returns as TAX files, they still support them (though compatibility may vary).
How to open a TAX file
You can open TAX files with Intuit TurboTax. To open a TAX file, select File → Open Tax Return. Since older versions of TurboTax use TAX files, compatibility may vary.