Because he had no other income for 2020, then, his taxable income will be nil.
Basically, the taxable income refers to income which is earned and subject to taxation.
Here, the after-tax premium paid through the employer will not be taxable because the premium paid by the employer in long term disability plan will be considered as benefits and benefits are tax-free.
In conclusion, because he had no other income for 2020, then, his taxable income will be nil.
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