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- Electronic Funds Transfer (EFT) Authorization (Excise Taxes)
- Energy Efficient Commercial Equipment Credit Addendum
- Enhanced Food Fish Excise Tax Addendum
- Escheat Property, Notice of
- Estate Tax Return (for deaths on or after January 1, 2014, Washington)
- (Estate Tax) Application for Extension of Time to File a Washington State Estate and Transfer Tax Return
- (Estate Tax) Affidavit Substantiating Decedent's State of Domicile at Death
- Excel Workbook
- Estate Tax Confidential Tax Information Authorization
- Excise Tax Electronic Filing and Payment Waiver Request (Form 41-1028)
- Excise Tax Returns
- Exemption Certificate for Logs Delivered to an Export Facility
- Exemption for Physical Improvement to a Single Family Dwelling, Application for
- Exemption for Qualifying Single Family Residences Damaged by a Natural Disaster
- Exemption Forms
- Exemption of Farm Machinery and Equipment, Application for (Property Tax Exemption)
- Exemption of Improvement Benefiting Fish and Wildlife Habitat, Water Quality, or Water Quantity, Application for
- Exemption of Real and Personal Property Used in the Manufacturing of Alcohol Fuel, Biodiesel Fuel, Biodiesel Feedstock, Wood Biomass Fuel, or Fuels from the Operation of an Anaerobic Digester
- Extension of Special Valuation on Improvements to Historic Property, Application and Certification for