Minimum Computer Requirements

When using the Free File Fillable Forms program, we recommend you review all the information on this page.


  • Never use handheld mobile devices with this program
  • Use a Recommended Browser and Operating System

If you fail to heed this caution, the program may cease working with your browser, operating system or device at any time and you may not be able to recover your account or your tax information.

Recommended Operating Systems and Browsers

Operating Systems: Windows and Mac only

Browsers: Free File Fillable Forms will run best using the latest versions of the following browsers:

We cannot recommend Safari, due to current compatibility and display issues.

Browser settings:

  • Set the language to default 
  • Enable JavaScript and cookies
  • Turn off:
    • Pop-up blockers
    • Auto-fill features
    • Private browsing features

Optimize Your Experience

You can optimize your Free File Fillable Forms experience by meeting these minimum requirements:

  • Processor: Intel Core 2 Duo 1.8 GHz
  • RAM: 1 GB
  • Monitor: 1280x960 or higher screen resolution
  • Internet Connection: High-speed connection
  • Other Software: Acrobat Reader 8.0+ (for printing)

Oldest Supported Operating Systems:

  • Windows 7
  • Windows 8 & 8.1
  • Windows 10 
  • Mac OS X 10.7 (Lion) 
  • Mac OS X 10.8 (Mountain Lion)
  • Mac OS X 10.9 (Mavericks)
  • Mac OS X 10.10 (Yosemite)
  • Mac OS X 10.11 (El Capitan)
  • Mac OS X 10.12 (Sierra)
  • Mac OS X 10.13 (High Sierra)
  • Mac OS X 10.14 (Mojave)