1. Environment for e-Tax Use

(1) Preparation of a computer

The e-Tax software assumes that the user's computer and e-Tax (reception system) transfer data of tax returns, applications, etc., via the Internet. Therefore, to use the e-Tax software, an Internet connection is required including a contract with an Internet service provider.

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(2) Recommended computer environment required for the use of the e-Tax software

To use e-Tax, as for the e-Tax software, we recommend the following system in terms of hardware, operating system (OS), and web browser. The recommended system is a computer system on which National Tax Agency has verified the operation of the software.


  • CPU: Pentium 4 (1.6 GHz) or higher (or equivalent)
  • Memory: 512 MB or more
  • Hard disc drive (HDD): 2 GB or more of available space
  • Screen resolution: 1024 x 768 or higher
OS Browser PDF Viewer
  • Microsoft Windows 7
  • Microsoft Internet Explorer 11
  • Adobe Acrobat Reader DC
  • Microsoft Windows 8.1
    * "Desktop mode" only.
  • Microsoft Windows 10

* Any systems (including OS, etc., for which the support has been ended) other than shown above are not recommended and may not be usable.
* Use a 32-bit version of a web browser.
* Use a Japanese version of an OS.
* Apply the latest service pack, etc., to the OS before using.
* Administrator privileges are required to perform installation, uninstallation, and version upgrade.

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