Fuel licenses: Dyed diesel user

Things to know

June 30, 2016 – All current fuel tax licenses expired. You’ll need to apply for a new fuel tax license to continue operations in Washington. Please register your account through the Taxpayer Access Point (TAP). TAP gives you an easier and faster way to manage your fuel tax accounts.

TAP is now available for Fuel Tax customers and Fuel Tax Refund Permit accounts. We may experience some delays with the implementation of the new system. Please be patient with our staff.

Who needs a license?

You need a license if you drive on public roads or highways using special dyed fuel. Dyed diesel users are government agencies or organizations approved by us, such as:

  • Public school districts
  • Nonprofit educational organizations
  • Government agencies

How to get your license

  1. Complete a Dyed Diesel User Application.
  2. Send the completed application to the address or fax number on the form.
  3. Once we process your application, we’ll send you a copy of:
    • Your license
    • Your first tax return
    • Instructions

Recordkeeping requirements

You need to keep detailed mileage records for each vehicle using dyed fuel on public roadways. These records must include on-road and off-road use on a daily basis.

How to file your tax return

Complete a Dyed Diesel Fuel User Tax Return and:

  • If you’re including a payment, mail your completed return and a check to:
    Prorate and Fuel Tax
    Department of Licensing
    PO Box 3777
    Seattle, WA 98124-3777
  • If you’re sending only your return (without a payment), mail or fax it to:
    • Mail:
      Fuel Tax Section
      Department of Licensing
      PO Box 9228
      Olympia, WA 98507-9228
    • Fax: 360.570.7839 or 360.586.9729

For more information about completing your return, see Dyed Diesel Tax Return Instructions.

Reporting due dates

Reporting period Report and payment due
January–March 2014 April 25, 2014
April–June 2014 July 25, 2014
July–September 2014 October 27, 2014
October–December 2014 January 26, 2015

Late payments

If your payment isn’t received by You’ll owe
Due date 10% penalty on the tax owed
1st of the following month Interest of 1% per month

Related information

Questions? Need help?

Call us: 360.664.1858

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