Colorado DOR Updates Guidance for Voluntary Income Tax Withholding

The Colorado Department of Revenue (DOR) issued a revised guidance document regarding voluntary withholding requirements for Colorado income tax, providing comprehensive information for taxpayers who voluntarily choose to withhold income tax from payments not otherwise subject to withholding requirements. The guidance outlines mandatory compliance requirements including registration with the Department, filing returns and remitting tax on quarterly, monthly, or weekly schedules based on annual withholding liability. [Colo. Dep’t of Revenue, Voluntary Withholding, 03/01/26]

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