The Washington Department of Revenue (DOR) has released summaries of tax-related laws enacted during the 2026 legislative session. The updated laws cover a wide range of tax matters including capital gains tax prepayments, renewable energy facility property tax exemptions, modifications to insurer taxes, establishment of a new tax on millionaires, estate tax modifications, various sales and use tax exemptions for items such as diapers and over-the-counter drugs, and administrative efficiencies for tax laws. [Wash. Dep’t of Revenue, 2026 Tax Legislation, 04/01/26]
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