## TL;DR
Fix this in Form 941 reconciliation agent by acting on the exact problem first: reconcile from aggregated liabilities and deposits per tax type and month held in a file, load detail rows only for the months whose aggregates differ, and keep the quarter working set to the aggregate table plus one month of detail at a time. Do not rerun the whole payroll workflow unchanged, because the same inputs produce the same failure. Prove the fix on one employee first, then rerun the full scope and reconcile the results against the payroll register.

```text
context overflow agent failed to reconcile Form 941 deposits for the quarter
```

## Use this when
- The operation in Form 941 reconciliation agent fails with this exact problem: context overflow agent failed to reconcile Form 941 deposits for the quarter.
- The same failure repeats on retry with unchanged inputs.
- A payroll run, tax filing, garnishment check or pay close is blocked until this is resolved.

## Not for this skill when
- The notice is a platform outage from the vendor. Resolve that first, then return here if this problem remains.
- The payroll completes and you only disagree with a pay policy decision such as a rate or a benefit rule. That is a policy change, not this failure.

## Steps
1. Reproduce the failure on one named employee in Form 941 reconciliation agent and record the full problem text plus the employee, pay period or filing involved. Verify: the failure is reproduced on demand on a named scope, not only seen in a log.
2. Apply the specific fix for this problem: reconcile from aggregated liabilities and deposits per tax type and month held in a file, load detail rows only for the months whose aggregates differ, and keep the quarter working set to the aggregate table plus one month of detail at a time. Verify: the single failing employee now behaves as the fix predicts, or the corrected value is visible on the record.
3. Check neighbouring employees, pay groups or filings that share the same pay code, deduction setup or import, because this class of failure rarely affects only one employee. Verify: the neighbouring items are listed and each is marked affected or clear.
4. Rerun the original operation in Form 941 reconciliation agent on the previously failing scope, watching for the same problem rather than assuming success from a quiet log. Verify: the operation completes and the original problem does not appear.
5. Compare the result against the source of truth, the payroll register, the tax filings or the employee records, so a silent partial success is caught. Verify: values match the source or every difference is named and explained.
6. Record the fix, the triggering input and the verification result on the employee or run record so the next occurrence is recognised immediately. Verify: the record names the problem, the fix applied and the evidence of success.

## Variant phrasings

### context overflow agent failed to reconcile Form 941 deposits for the quarter
The verbatim form searchers paste from the console, report or run log. Treat it identically: same fix, same single employee proof, then the full rerun.

### How to fix - context overflow agent failed to reconcile Form 941 deposits for the quarter error context limit failure
The how to phrasing for the same failure in Form 941 reconciliation agent. The steps above apply unchanged; start at the reproduction step rather than skipping to the rerun.

### Form 941 reconciliation agent troubleshooting for this failure
The symptom first phrasing used when the console hides the full problem. Surface the full problem first, confirm it matches the text block above, then follow the steps.

## Why it happens
Loading every employee pay line for a full quarter into the working context overflows it before reconciliation starts, while the reconciliation decision only needs aggregates except where a difference has already been found.

## Edge cases
- The employee was terminated, transferred or given a rate change after the failing run started. Refresh the employee state and reapply the fix against the current values, not the values from the failed run.
- The single employee proof passes but the full rerun still fails on other employees. Treat each remaining failure as its own scope, because a shared pay code or import can hide more than one cause.
- The source systems disagree on the correct value. The payroll register governs amounts paid, the tax filings govern amounts reported, and the employee record governs setup; record which source won and why.

Compatibility: Form 941 reconciliation agent at current versions, plus the payroll system, time system or general ledger the query names; no extra tooling beyond access to the payroll register, tax filings and employee records needed to verify results.

## Provenance

Resolved from the public thread: https://vectle.com/posts/pst_5X6Cv245GdJzlUdEF2a5xA