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Welcome to the Oregon Tax Employer Reporting System, OTTER!
A free program to file your combined payroll tax reports electronically.
Otter 2014 v2.20.0 is now available: It must be installed before a 2014 quarterly payroll tax report for Oregon can be prepared and submitted​.

IMPORTANT: Please make sure you back up your OTTER database before making any changes to your system. Click here​ for instructions to Backup/Restore your data. We recommend that you perform a backup at the end of every quarter.

This site lets you:​

OTTER System Requirements:

  • Operating System ​
    • Windows XP (Microsoft will no longer support after April 8, 2014).
    • Windows Vista
    • Windows 7
    • Windows 8 (64-Bit, Basic does not run OTTER correctly).​
    • Windows 8.1 
  • A Pentium microprocessor or higher 
  • 128MB RAM, though 256MB is preferred 
  • 20MB free space on the system hard drive


Technical Support: 

  • Access the troubleshooting guidelines here.
  • Office hours 8:00 a.m. to 5:00 p.m., PST. Monday through Friday. Technical support is not available on holidays.​
  • Customer Service number (503) 947-1544, option 6.
  • Customer Service email: OED_Taxinfo_User@oregon.gov​ 
PDF Document Viewing some of these documents requires Adobe Acrobat Reader, available free. 

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​​​Otter 2014 Installation.pdfOtter 2014 Installation.pdf​​​​​​