Final answer:
The incorrect statement is b, since Luis, a sole shareholder of a C corporation, does not report the corporation's income of $80,000 on his personal return; the corporation is taxed separately on its profits.
Step-by-step explanation:
The question presented involves understanding how income is reported and taxed for different types of business structures, specifically comparing a regular C corporation with a sole proprietorship. Options a and c are accurate. For a sole proprietorship, like Eduardo's, the business is not taxed separately; instead, all profits are reported on Eduardo's personal income tax return. Eduardo thus reports $80,000 of income, which corresponds to his business's profit. Option c is also true in that a sole proprietorship does not pay income tax as a separate entity.
Luis, as the sole shareholder of a C corporation, faces a different tax situation, which is described by option d. The corporation is taxed separately from Luis on its profits, and hence must pay income tax on its $80,000 of earnings before any distributions are made to Luis. Option b is incorrect because Luis personally would not report the entire $80,000 of the C corporation's income on his personal income tax return. Instead, he would report whatever dividend income he received from the corporation, if any, which in this scenario is unspecified. The $50,000 that Luis withdraws could be a salary or a dividend, which would be taxed differently on Luis's personal tax return.