It may be fully, partially or not taxable at all.
The part for which your employer paid the premiums would be taxable to you. If you paid the premiums from pre-tax dollars, in other words you deducted the premiums paid from your taxable wages, that would also be taxable. If you paid the premiums from post-tax dollars, in other words from wages that you included in your income, then that portion of the benefits would not be taxable to you. You can learn more from this TurboTax Article.
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