WGU - C237 - TAXATION QUESTIONS AND
ANSWERS 2026 LATEST
Part I: The Nature, Purpose, and Scope of the Tax System (Questions 1-20)
1. Which of the following tax rate structures imposes an increasing marginal tax rate as the
tax base increases?
A) Proportional
B) Regressive
C) Progressive
D) Flat
Answer: C
Rationale: A progressive tax rate structure is defined by marginal tax rates that increase as
taxable income rises. The U.S. Federal Income Tax is the primary example of this structure .
2. If a taxpayer pays an average tax rate of 15% but a marginal tax rate of 25%, what does
this indicate about their income level?
A) They have no taxable income.
B) They are in the lowest tax bracket.
C) They have sufficient income to reach higher brackets, but not all income is taxed at the
top rate.
D) They only receive tax-exempt income.
Answer: C
Rationale: The marginal rate applies to the next dollar earned. If the marginal rate (25%) is
higher than the average rate (15%), it confirms the taxpayer has enough income to push into
higher brackets, while the lower brackets keep the average down .
3. Which of the following is an example of a "sin tax"?
A) Income tax on wages
B) Property tax on a primary residence
C) Excise tax on cigarettes
D) Estate tax on inherited wealth
Answer: C
Rationale: Sin taxes are levied on goods considered socially undesirable, such as tobacco,
alcohol, and gambling, primarily to discourage consumption while raising revenue .
,4. A taxpayer receives a refund from the state government for overpaid state income
taxes. Under the tax benefit rule, when is this refund included in federal gross income?
A) Always, because all refunds are taxable.
B) Never, because state taxes are always deductible.
C) Only if the taxpayer itemized deductions in the prior year and received a federal tax
benefit from the deduction.
D) Only if the taxpayer used the standard deduction in the prior year.
Answer: C
Rationale: The Tax Benefit Rule states that a refund is only included in gross income to the
extent the deduction reduced taxable income in the prior year. If the taxpayer took the
standard deduction, the state tax payment provided no benefit, so the refund is tax-free .
5. What is the primary difference between tax avoidance and tax evasion?
A) Avoidance is illegal; evasion is legal.
B) Avoidance minimizes tax via legal means; evasion involves illegal concealment of income.
C) Evasion is planning after the transaction; avoidance is planning before.
D) There is no difference; both are felonies.
Answer: B
Rationale: Tax avoidance is the legal minimization of tax liability using the tax code (e.g.,
contributing to a 401k). Tax evasion involves illegal acts such as hiding income or claiming
false deductions .
6. Which of the following judicial doctrines allows the IRS to collapse a series of
transactions into a single transaction to determine the true tax liability?
A) Substance Over Form Doctrine
B) Step-Transaction Doctrine
C) Business Purpose Doctrine
D) Economic Substance Doctrine
Answer: B
Rationale: The Step-Transaction Doctrine allows the IRS to combine interrelated steps to
determine the tax result of the overall transaction, preventing taxpayers from avoiding tax
by breaking a transaction into technical but meaningless pieces .
7. The City of Austin imposes a tax on the fair market value of all tangible property located
within city limits. This is a form of:
A) Transaction tax
B) Ad Valorem tax
C) Franchise tax
D) Earmarked tax
Answer: B
Rationale: Ad Valorem is Latin for "according to value." Property taxes are the most common
example of ad valorem taxes, assessed as a percentage of the property's assessed value .
, 8. Which of the following criteria for a tax system requires that taxpayers should be able to
determine when to pay the tax, how much to pay, and how to pay it?
A) Economy
B) Equity
C) Sufficiency
D) Certainty
Answer: D
Rationale: Adam Smith's canon of Certainty dictates that the tax system should be clear and
predictable so taxpayers know their obligations without guessing .
9. A married couple earning $400,000 annually pays the same dollar amount for their
vehicle registration as a single individual earning $40,000. This vehicle registration fee is
best described as:
A) Progressive
B) Proportional
C) Regressive
D) Digressive
Answer: C
Rationale: A regressive tax takes a larger percentage of income from low-income earners
than from high-income earners. Since the dollar amount is flat, the lower-income earner
pays a higher percentage of their income toward the fee .
10. What is the purpose of the "12-Month Rule" regarding prepaid expenses?
A) It disallows all prepaid expenses.
B) It allows a cash-method taxpayer to deduct a prepaid expense immediately if the benefit
period does not extend beyond 12 months after the first benefit is received.
C) It requires all prepaid expenses to be capitalized.
D) It applies only to inventory costs.
Answer: B
Rationale: The 12-Month Rule is an exception to the general prohibition against deducting
prepaid expenses. If the contract period is 12 months or less and does not extend beyond
the end of the next tax year, the expense can be deducted immediately .
11. Which of the following is considered "earned income" for tax purposes?
A) Dividends from stock holdings
B) Interest from a savings account
C) Wages from a part-time job
D) Rental income from a tenant
Answer: C
Rationale: Earned income includes wages, salaries, tips, and other employee compensation.
It also includes net earnings from self-employment. Unearned income includes interest,
dividends, and rents .
ANSWERS 2026 LATEST
Part I: The Nature, Purpose, and Scope of the Tax System (Questions 1-20)
1. Which of the following tax rate structures imposes an increasing marginal tax rate as the
tax base increases?
A) Proportional
B) Regressive
C) Progressive
D) Flat
Answer: C
Rationale: A progressive tax rate structure is defined by marginal tax rates that increase as
taxable income rises. The U.S. Federal Income Tax is the primary example of this structure .
2. If a taxpayer pays an average tax rate of 15% but a marginal tax rate of 25%, what does
this indicate about their income level?
A) They have no taxable income.
B) They are in the lowest tax bracket.
C) They have sufficient income to reach higher brackets, but not all income is taxed at the
top rate.
D) They only receive tax-exempt income.
Answer: C
Rationale: The marginal rate applies to the next dollar earned. If the marginal rate (25%) is
higher than the average rate (15%), it confirms the taxpayer has enough income to push into
higher brackets, while the lower brackets keep the average down .
3. Which of the following is an example of a "sin tax"?
A) Income tax on wages
B) Property tax on a primary residence
C) Excise tax on cigarettes
D) Estate tax on inherited wealth
Answer: C
Rationale: Sin taxes are levied on goods considered socially undesirable, such as tobacco,
alcohol, and gambling, primarily to discourage consumption while raising revenue .
,4. A taxpayer receives a refund from the state government for overpaid state income
taxes. Under the tax benefit rule, when is this refund included in federal gross income?
A) Always, because all refunds are taxable.
B) Never, because state taxes are always deductible.
C) Only if the taxpayer itemized deductions in the prior year and received a federal tax
benefit from the deduction.
D) Only if the taxpayer used the standard deduction in the prior year.
Answer: C
Rationale: The Tax Benefit Rule states that a refund is only included in gross income to the
extent the deduction reduced taxable income in the prior year. If the taxpayer took the
standard deduction, the state tax payment provided no benefit, so the refund is tax-free .
5. What is the primary difference between tax avoidance and tax evasion?
A) Avoidance is illegal; evasion is legal.
B) Avoidance minimizes tax via legal means; evasion involves illegal concealment of income.
C) Evasion is planning after the transaction; avoidance is planning before.
D) There is no difference; both are felonies.
Answer: B
Rationale: Tax avoidance is the legal minimization of tax liability using the tax code (e.g.,
contributing to a 401k). Tax evasion involves illegal acts such as hiding income or claiming
false deductions .
6. Which of the following judicial doctrines allows the IRS to collapse a series of
transactions into a single transaction to determine the true tax liability?
A) Substance Over Form Doctrine
B) Step-Transaction Doctrine
C) Business Purpose Doctrine
D) Economic Substance Doctrine
Answer: B
Rationale: The Step-Transaction Doctrine allows the IRS to combine interrelated steps to
determine the tax result of the overall transaction, preventing taxpayers from avoiding tax
by breaking a transaction into technical but meaningless pieces .
7. The City of Austin imposes a tax on the fair market value of all tangible property located
within city limits. This is a form of:
A) Transaction tax
B) Ad Valorem tax
C) Franchise tax
D) Earmarked tax
Answer: B
Rationale: Ad Valorem is Latin for "according to value." Property taxes are the most common
example of ad valorem taxes, assessed as a percentage of the property's assessed value .
, 8. Which of the following criteria for a tax system requires that taxpayers should be able to
determine when to pay the tax, how much to pay, and how to pay it?
A) Economy
B) Equity
C) Sufficiency
D) Certainty
Answer: D
Rationale: Adam Smith's canon of Certainty dictates that the tax system should be clear and
predictable so taxpayers know their obligations without guessing .
9. A married couple earning $400,000 annually pays the same dollar amount for their
vehicle registration as a single individual earning $40,000. This vehicle registration fee is
best described as:
A) Progressive
B) Proportional
C) Regressive
D) Digressive
Answer: C
Rationale: A regressive tax takes a larger percentage of income from low-income earners
than from high-income earners. Since the dollar amount is flat, the lower-income earner
pays a higher percentage of their income toward the fee .
10. What is the purpose of the "12-Month Rule" regarding prepaid expenses?
A) It disallows all prepaid expenses.
B) It allows a cash-method taxpayer to deduct a prepaid expense immediately if the benefit
period does not extend beyond 12 months after the first benefit is received.
C) It requires all prepaid expenses to be capitalized.
D) It applies only to inventory costs.
Answer: B
Rationale: The 12-Month Rule is an exception to the general prohibition against deducting
prepaid expenses. If the contract period is 12 months or less and does not extend beyond
the end of the next tax year, the expense can be deducted immediately .
11. Which of the following is considered "earned income" for tax purposes?
A) Dividends from stock holdings
B) Interest from a savings account
C) Wages from a part-time job
D) Rental income from a tenant
Answer: C
Rationale: Earned income includes wages, salaries, tips, and other employee compensation.
It also includes net earnings from self-employment. Unearned income includes interest,
dividends, and rents .
