Based on the information given, it should be noted that the amount of William's pension distribution that is taxable is $30000.
From the information given, William is a retired single taxpayer and he received a monthly pension of $2,500 ($30,000 annually). He did not contribute any after-tax dollars to the plan.
It should be noted that pension is counted as a regular income for tax purposes. Therefore, the pension that'll be received by William will be a taxable income
Therefore, the taxable amount will be $30000.
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