Final answer:
The correct statement is that Lizzie must include the $500 refund as income in 2017, in accordance with the tax benefit rule, which applies since she's a cash-based taxpayer.
Step-by-step explanation:
Lizzie is a cash-based taxpayer who paid state income taxes of $5,000 in 2016 and received a $500 refund in 2017. The correct statement regarding this scenario is: that Lizzie must include the $500 refund as income in 2017. This is because, under the tax benefit rule, refunds received in a later year for taxes that were deducted in a previous year must be included in income to the extent that the taxpayer received a tax benefit from the deduction. In the case of Lizzie, because she is a cash-based taxpayer, the payment in the previous year would have been deducted from her income, lowering her taxable income, thus the refund is considered income.