There is only one file type that uses the .TAX13 extension:
TurboTax 2013 Tax Return File
- Developer Intuit
-
Popularity
3.7 (3 votes)
- Category Data Files
- Format Binary
Alternate file extension used by TurboTax for 2013 tax returns; contains federal and state tax forms as well as data entered by the user; can be electronically submitted to the IRS and state tax authorities when completed.
NOTE: TurboTax 2013 saves tax returns with a .TAX2013 file extension by default. However, the program recognizes files saved with the shortened ".tax13" extension as well.
| Software's name | License | Platforms |
|---|---|---|
Intuit TurboTax |
Commercial |    |
Intuit TurboTax Online |
Free+ | |
Updated: November 24, 2016