Final answer:
The statement is true. The $5,000 difference between the contribution and the tuition charge does not need to be included in their gross income.
Step-by-step explanation:
The statement "When the funds were withdrawn to pay the college tuition for Michael, neither Mia nor Michael must include $5,000 ($20,000 - $15,000) in gross income." is True.
According to the information provided, Mia contributed $15,000 to a qualified state tuition program for the benefit of her son Michael. When the funds were withdrawn to pay for Michael's college tuition, the balance in the fund was $20,000. Therefore, the $5,000 difference between the contribution and the tuition charge does not need to be included in their gross income.