TAX File Extension
TurboTax Tax Return
- File Type tax
- Developer Intuit
- Popularity
- Application TurboTax
- Category Financial and Tax Files
What is a TAX file?
TurboTax Tax Return, identified by the TAX extension, is a Financial and Tax Files type and includes 268 files.
With the creation of the TurboTax Tax Return (TAX), Intuit introduced file format along with 7 programs built for their use.
TAX files are supported by Windows and Mac OS. You can open a TAX file using one of 3 programs, for example TurboTax, Quicken and Quicken Essentials.
File Signature
HEX code: 54 54 46 4E 01 01. ASCII code: TTFN.
Programs that support TAX files
How to open a TAX file?
The most common reason why a TAX file cannot be opened is the absence of required software. To fix this, select a compatible program from the list. Then visit the official developer website via the provided link, download the program, and install it on your system.
The most popular programs for working with TAX files are TurboTax, Quicken and Quicken Essentials. To get the latest version of TurboTax, open the Intuit website where a universal installer for all operating systems is available.
Once setup is done, your operating system should assign TurboTax as the default app for TAX files.
Make TurboTax the default TAX viewer
Changing the default program in Windows
- Start by right-clicking on your TAX file and selecting the "Open With" option. From there, click "Choose another app" to continue;
- Inside the popup window, scroll through the list of applications and specifically choose TurboTax as the application to associate with your TAX file;
- Check the "Always use this app" checkbox and click "OK".
Change the default app to open files on Mac
- Right click or use Control + Left Click on the desired TAX file to access a dropdown menu of actions;
- Select "Open in application" and click "Other";
- Scroll down to the bottom of the window, where you will find the "Enable" menu. Default, "Recommended Programs" will be selected;
- In this menu, choose "All Programs" and navigate to TurboTax. Check the box next to "Always open in app" to make it the default program.
Convert to and from TAX
If a TAX file is difficult to handle, you might try converting it to formats such as PDF, QIF, TXF or similar, which may be easier to work with.
Please note that after converting a TAX file, some functionality may differ from the original. However, in many cases, it can be converted back to its original format.
Convert TAX to other file formats
Finding answers to TAX file problems
If you encounter issues with TAX files, don’t worry—most can be fixed with minor software adjustments. Refer to the troubleshooting tips below.
What are the signs that my TAX file is damaged?
Corrupted TAX financial and tax files may have one or more of the following symptoms:
- Poor performance when editing a file in TurboTax;
- Opening or processing the file in TurboTax or other programs causes instability or crashes in the program;
- The file shows errors when trying to open it or does not open completely;
- Unexpected expansion of the total size of the TAX file;
- Working with the file triggers the display of error messages;
Why does TurboTax quit or crash unexpectedly?
TurboTax crashes can be attributed to outdated software. Make sure you have installed the latest updates for Intuit products.
A computer restart is often the key to solving numerous common problems. That’s why, it is recommended to restart the computer before making any changes to the software settings.
What methods can be used to repair a damaged TAX file?
Use a recovery program to open the damaged TAX file and navigate to the "Repair" menu item. Wait for the recovery process to finish, as it will automatically repair damaged financial and tax files.
How to edit a TAX file?
To edit TAX files, you need to install specialized software that allows you not only to open but also to modify financial and tax files. Online TAX editors usually provide fewer features than software created specifically for TurboTax Tax Return.
List of Top TAX editors 2026
Following these criteria, we have put together a list of recommended TAX editors.
| TAX Editor Software | Developer | Platforms | Overall Rating |
|---|---|---|---|
| TurboTax | Intuit | Windows, Mac OS | 4.1 out of 5 (36 reviews) |