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UIFastTax is not compatible with Windows 7, Windows 8, Windows 8.1 and Vista. 

Users with these operating systems who elect to use UIFastTax will experience difficulties, such as losing their data, unable to retrieve tax rates or quarters, as well as connectivity issues with the Employment Security server. 

If you are using Windows Experience (XP) or an older version of Windows and having issues with UIFastTax working, we recommend that you backup your data, uninstall and reinstall the application.

In UIFastTax under the file menu, select backup and then select backup user data. UIFastTax will automatically assign the backup file a file name. Select a backup location and click the save button.

To remove UIFastTax, Click Start, click Control Panel, and then double-click Add or Remove Programs.

In the Currently installed programs box, click the program that you want to remove, and then click Remove.

If you are prompted to confirm the removal of the program, click Yes.

To re-install UIFastTax, go to the link below under the heading UIFastTax and select Download full version.

Did you know?

There might be a filing tool that would better meet your needs. Please visit to learn more about the different filing methods available. For instance, you might already be on your way to filing using Employer Account Management Services (EAMS) if you file your Labor and Industries (L&I) taxes by logging into Secure Access Washington.

For additional questions or to get more information about filing your quarterly report, paying taxes, or about our electronic filing tools, contact your tax account management center.


The documents on this page are in PDF format. If you do not have Adobe Acrobat installed on your computer, download the reader.

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Note: After you have filed for two consecutive quarters using an electronic filing method, you will no longer receive paper forms in the mail.

Minimum system requirements

Note: UIFastTax is not Mac compatible. Mac users can use EAMS or UIWebTax to file quarterly reports.

Along with a basic knowledge of the Windows operating system, the minimum requirements are:

  • Pentium 133 Processor
  • Windows 95, 98, Millenium Edition (ME), New Technology (NT), 2000 or XP (Experience)
  • 32 MB of RAM and 20 MB of available hard disk space
  • Mouse and Keyboard
  • Super VGA 800x600 Minimum (Normal/small fonts)

For system issues with ePay, UIWebTax, EAMS or UIFastTax (except UIFastTax user with Windows 7, Windows 8, (8.1) or Windows Vista), contact technical support at 800-565-4660 or email

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