
Four kinds of errors that keep reaching review at CPA firms — carryforward mismatches, unauthorized elections, source disagreement, and disclosure gaps — and the structural reason each one survives preparation instead of getting caught there.

Why a reviewer's most useful note is also the one a firm is least likely to still have next season — and what nothing in Circular 230 requires it to survive.

The order a second-level reviewer actually works in — prior year, diagnostics, one full read, targeted sourcing, then judgment — and why getting the sequence wrong costs more than getting one line wrong.

OPR Alert 2026-19 maps a practitioner's existing Circular 230 duties onto AI-assisted tax work — due diligence, competence, honest billing, client confidentiality. It never asks the practitioner to tell the client AI was involved.

IR-2026-97 gave taxpayers a digitally verifiable filing-and-payment history. It confirms compliance, not accuracy — which is exactly the gap tax return review exists to close.

On August 10, 2026, the IRS wrote itself a rulebook for using AI: a named accountable official, a documented risk determination for every use case, and a written approval on file for any exception. Most CPA firms adopting AI for tax review have none of that on paper — here's what to borrow from it.

The order a second-level reviewer actually works in — prior year, diagnostics, one full read, targeted sourcing, then judgment — and why getting the sequence wrong costs more than getting one line wrong.

The five preparer-side gates a return should clear before it reaches a reviewer, and what an incomplete file actually costs a firm when it skips them.

IR-2026-97 gave taxpayers a digitally verifiable filing-and-payment history. It confirms compliance, not accuracy — which is exactly the gap tax return review exists to close.

The eight steps a completed return actually moves through before it is signed and filed — from organizer intake to e-file authorization — and the due-diligence obligations under Circular 230 that make each step non-optional.

On August 10, 2026, the IRS wrote itself a rulebook for using AI: a named accountable official, a documented risk determination for every use case, and a written approval on file for any exception. Most CPA firms adopting AI for tax review have none of that on paper — here's what to borrow from it.

A firm-wide, return-type-agnostic review checklist: engagement scope, prior-year continuity, agreement to source, positions and authority, required disclosures, and e-file signature — the six checks that apply before any entity-specific schedule review starts.

IR-2026-87 expanded the digital notice library in Business Tax Account. The notices are the same; the delivery path is not — and most firm intake processes still assume a client forwards an envelope.

Tax return review is the independent second look a return gets before it is signed — what it checks, why professional standards make it mandatory rather than optional, and the specific line where automation stops and judgment starts.

What tax return review actually checks, the multi-tier model most CPA firms run it through, and the Circular 230 and IRC 6694 obligations that make it effectively mandatory — the hub for Pernee's Tax Review cluster.