This module covers common deductions that appear on Form 1120 and the review questions that go with them. You'll learn to connect expense categories to the correct line item, apply limitation rules like the 50% meals disallowance and charitable contribution limits, and distinguish currently deductible costs from those requiring capitalization. For each deduction type, you'll identify the substantiation that must be in the file before the item is ready to claim. Strong deduction review requires more than spotting an expense—it requires confirming the treatment is correct and supported.

This module focuses on corporate tax credits, which reduce tax liability directly rather than reducing taxable income. You'll learn to identify common credits—including the research and development credit and foreign tax credit—match each to the correct IRS form, and test basic eligibility requirements. You'll also practice recognizing when a credit concept belongs to individual taxpayers rather than C corporations, a common source of review errors. Understanding how credits differ from deductions helps you start every review with the right classification.

This module turns eligibility and substantiation concepts into a repeatable pre-claim checklist. You'll learn what documentation is required for common deductions and credits, how long records should be retained, and how to evaluate whether a file is ready for filing or needs follow-up. You'll also practice communicating documentation gaps clearly—explaining what's missing, why it matters, and what action is needed. A claim that cannot be substantiated is not ready to report, and this module helps you make that call consistently.

This module ties together everything from the course by reviewing the most common preventable errors in corporate tax work. You'll learn why mistakes happen—missing substantiation, importing individual concepts, skipping limitation checks—and how to catch them before a return is filed. A final case review activity gives you practice classifying a mixed file of deductions and credits, deciding what's ready to claim, what needs follow-up, and what should be removed. By the end, you'll be able to defend your review decisions with clear reasoning, not just instinct.