The TurboTax .tax file: what it is, where it lives and how to open it

What is a TurboTax .tax file?

A TurboTax .tax file is the working data file for one return, and the TurboTax tax file extension tells you the year. A file ending in .tax2025 holds a tax year 2025 return (filed in 2026), and one ending in .tax2024 holds a 2024 return. It is not a printable document: it stores your answers and entries in a format only TurboTax software reads.

That makes it different from the PDF of your return. The PDF is the finished forms, readable anywhere and accepted by other tax programs as a prior-year import. The .tax file is what TurboTax needs to reopen, change or amend the return, and to carry data into next year's TurboTax.

The extension for tax year 2026 returns, used in the 2027 season, has not been announced. Intuit has not yet released that edition; based on the pattern above it would be expected to end in .tax2026, but confirm once the software ships.

Where does TurboTax save my return?

On Windows, TurboTax Desktop saves returns in the TurboTax folder inside Documents unless you chose another folder. On a Mac, Intuit says the default file name is the primary taxpayer's name followed by the two-digit tax year.

Finding the file on Windows

1. Open the Start menu and search for the extension, such as *.tax2025.
2. In the results, select the arrow next to the file to expand its details.
3. Choose Open file location to see the folder it is in.
4. Open the return from inside TurboTax with File, Open Tax Return. Intuit warns against double-clicking the file in search results, which can cause errors.

Finding the file on a Mac

Open Spotlight, type .tax and do not press Enter; tax returns appear under Documents. If not, choose Search in Finder, switch to List view and look for items whose Kind is a TurboTax tax return.

How to download a .tax file from TurboTax Online

TurboTax Online can give you a .tax file for the current year so you can finish the return in TurboTax Desktop. Sign in, select Start or Continue on Tax Home, then open Tax Tools, Tools, and in the Tools Center choose the option to save your return to your computer. For a 2025 return the download is named taxReturn.tax2025.

You can rename it, for example to SmithReturn.tax2025, but keep everything after the dot unchanged. For earlier years, Intuit says to select the year on Tax Home and use Download .tax file. The file only helps if you own or buy TurboTax Desktop for the same year; for simply keeping a copy, the PDF is the better download, as explained in downloading a prior-year return from TurboTax.

Can I open a .tax file without TurboTax?

No practical way exists for most people. Intuit states that you need the same year's version of TurboTax to open a tax file, so a .tax2023 file needs TurboTax 2023. Newer editions will transfer data from last year's file into a new return, but they do not open an old year's return for viewing or printing.

Be careful with websites that offer to convert a .tax file to PDF. They are not Intuit services, and the file contains Social Security numbers and bank details for everyone on the return. H&R Block's software can read an unencrypted TurboTax file, a route covered in import TurboTax to H&R Block.

Opening old years and moving files between computers

Opening a file on a computer that lacks the right pieces produces errors, not a blank screen. The best known is TurboTax error 190, which appears when a tax file contains state forms that are not installed on that computer. Intuit's fix is to start a new return, download the needed state under State Taxes, close and reopen TurboTax, then open the file again; details are on TurboTax error 190.

When you replace a computer, copy the whole TurboTax folder, not just this year's file, and install each year's edition you might need later. The full process is on TurboTax transfer to new computer.

How to back up your TurboTax tax files

Keep two copies of each year: the .tax file and a PDF of the filed return, stored in at least two places. The .tax file lets you amend or carry data forward; the PDF works even after you stop owning TurboTax.

If your backup goes to a cloud service, encrypt it or use a service with account two-step verification, since the file identifies everyone on the return. A saved PDF also needs to print cleanly; if it will not, see TurboTax printing problems.