Tax review backlog: Fix the work entering the queue or add reviewers?

Follow a return through the queue

Pick a representative week, including returns that are still open at the end. Use the return or engagement ID to connect the client-document list, preparation record, reviewer assignment, review notes, and completion status. You don't need a new dashboard to start. A shared sheet can answer the question if the team records each handoff consistently.

For each return, capture the time it entered preparation, whether required inputs were present, when it first reached review, when a reviewer started and stopped, why it came back, each later review pass, and when it was accepted. Record active review minutes separately from days waiting. A five-day queue with twenty minutes of review calls for a different decision than five hours of expert judgment on every return.

Use one reason code for the primary cause of each return or wait: missing client input, repeat preparation defect, tax judgment, external dependency, or unknown. Add a short note and an owner. Don't force an unclear return into a convenient category; ask the preparer and reviewer what actually stopped it.

Decide what the counts mean

Here's the decision table to use at the end of the week:

Look at the share of returns sent back from first review alongside ready-queue age and completed returns per week. If returns mostly clear first review but sit ready for days, more review capacity may be the right answer. If they repeatedly come back, adding reviewers alone leaves the cause in place. Keep quality visible so faster completion doesn't simply move errors downstream.

Put each fix where the work begins

For missing inputs, write a readiness rule that names the required documents and unresolved questions for each return type. Let the person who owns client collection see what is missing. Hold the return before preparation starts, or mark the specific work that can proceed while another item is pending. The rule should be visible to preparers and reviewers, with a named person who can approve an exception.

For repeat defects, create one preparation package that presents the source documents, workpapers, open questions, and preparer's checks in the same order every time. Review your firm's past review notes for recurring patterns. Fixed completeness checks can catch absent fields or documents. An AI assistant can compare a prepared package with permitted past-note patterns and flag a possible repeat issue, with a link to the workpaper and the pattern behind the flag. It should produce a review item, not a tax conclusion or an automatic sign-off. The reviewer decides whether the flag matters, and the signing professional keeps responsibility for the return.

Here's what a review item could look like: “The preparation package lists a carryforward adjustment, but the supporting workpaper link is missing. Source: preparation checklist item 7. Pattern: prior review note category ‘missing support.’ Action: ask the preparer for the workpaper before manager review.” A clear item lets a person verify the source and resolve it. A vague “possible error” just adds another queue.

Use your current tax, document, and workflow software for the gate and queue if it can enforce the rules and keep a usable history. A spreadsheet may be enough for the first measurement week. Build an integration or AI check only when repeated issues are common enough to justify the setup, testing, access controls, and someone to maintain it. If the sample shows qualified judgment is the actual limit, spend on that capacity instead.

Test the change on finished returns

Before changing live review, have preparers and reviewers label a set of past returns: which were ready, why each came back, and what a correct pre-review flag would have shown. Use some to set the rules and a separate set to test them. Count missed defects and needless flags. Check that every AI flag points to the right return and supporting material. Agree on an acceptable quality bar with the people who sign the work.

Then run the new gate or assistant alongside normal review on a small live group. Record who corrects the flag, how long it takes, and whether the return clears first review. Compare the same measures from the diagnostic week: returns that were ready at entry, first-review returns, active review minutes, ready-queue waiting days, accepted completions, and quality notes. Keep the work type and mix in view when you compare weeks.

If first-pass returns improve but the ready queue still grows, check reviewer capacity again. If the queue shortens but completions don't rise, follow the return to final acceptance and client delivery. A local improvement earns more investment when finished work improves, not when one step looks faster.