This module introduces the role of Excel workpapers in corporate tax return preparation. Learners explore how source accounting data moves from records such as the trial balance and general ledger into organized workpapers and then into ONESOURCE through mapped field codes. The module also introduces the five-tab workpaper structure and emphasizes the importance of using the final filed prior-year return when verifying carry forwards.

Build the vocabulary that supports daily corporate tax work. This module introduces core terms such as book income, taxable income, Schedule M-1, carryforwards, estimated tax payments, and apportionment, with a focus on where these terms appear in workpapers, returns, and ONESOURCE.

This module introduces Form 1120 as a connected return structure rather than a simple set of data-entry lines. Learners examine how amounts should trace from source support to workpapers to return lines, and how cross-references and tie-outs help confirm return accuracy. The module builds a review mindset focused on traceability, zero-difference tie-outs, and early identification of structural issues.

This module introduces the habits that make routine corporate tax calculations reliable and reviewable. You will learn why reproducibility, traceability, clear labels, and consistent rounding matter in tax workpapers, and how to structure files so another reviewer can follow the logic from source to output. You will also practice summarizing core tax concepts in a concise, Excel-style format that supports efficient internal review.