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That is why a serious prior-year review starts below the tax form. OptiBooks is an AI-assisted review platform being built to examine the return and the records behind it together, then show the CPA what may be wrong, what may still be fixable and what evidence is missing.
Join the CPA beta waitlist Prior-year review built around the books, not just the form.Why the books matter
The preparer asks whether the return correctly reports the records provided. A deeper review also asks whether the treatment inside those records was supportable.
Both are legitimate scopes of work. But they find different things. A capitalization decision repeated across several years may flow cleanly from the fixed-asset schedule to the trial balance to the return. The form can be internally consistent while the originating treatment still needs to be reconsidered.
That is not an indictment of the preparer. The underlying books may never have been within the engagement scope. A prior-year recovery review deliberately brings them into scope.
The review sequence
Judge the position under the law and facts applicable to that tax year. A different treatment being more favorable does not, by itself, make the filed treatment wrong.
Depending on the issue, the route may be an amended return, a Form 3115 accounting-method change, a current or forward-year correction, or no permissible action. Those routes are not interchangeable.
Refund availability can depend on filing and payment dates, extensions and other case-specific facts. If the dates needed to test the window are missing, the honest answer is “cannot determine”—not “probably open.”
A correction can affect basis, depreciation, carryforwards, book-tax differences and later returns. The review is incomplete until it traces the consequence beyond the first year that produced an apparent benefit.
The output
A prior-year finding should save the CPA investigative time without asking the CPA to trust an unexplained conclusion.
The finding states what kind of issue it is. That keeps a possible compliance correction from being marketed as an optional planning idea and prevents an expired or unsupported item from appearing actionable.
The reviewer sees what the records show, what rule is being applied, which facts must be confirmed and which documents would resolve the remaining uncertainty.
The analysis distinguishes an estimated opportunity from a CPA-approved adjustment and traces the proposed treatment into the affected returns, accounting records and future-year controls.
What the review cannot promise
Questions
Because the return may accurately report the trial balance it was given while the accounting contains a classification, capitalization, timing or method decision worth revisiting. The return and the accounting answer different questions, so a return-only review can miss issues that begin in the books.
Determine whether the original treatment was supportable, identify the legally available correction mechanism, evaluate the relevant filing and payment dates, and consider the effect on intervening and future years. If the necessary facts are missing, the result remains undetermined.
No. A finding may require an amended return, an accounting-method change, a forward-looking correction or no action. A closed refund period, insufficient evidence or an unsupported legal position may prevent recovery even when the underlying issue is worth understanding.
No. It is being built to organize the facts, authority, correction route, estimated impact and unresolved questions so the CPA can evaluate the issue efficiently. The professional still decides whether the position is supportable and worth pursuing.