The preparation path and the control path are separated where practical. Controls check source coverage, duplicate or missing items, totals, mappings, unusual variances, reconciliation results, and changes between prepared and final work. TaxSlayer remains the official calculation engine; no claim is made that this layer independently recomputes every return.
A professional correction becomes a traceable evaluation case—not automatic training data. The team classifies the cause, creates a bounded fix, reruns the affected case plus earlier cases that could break, releases to a limited group, monitors the result, and keeps a rollback path. The system does not retrain, deploy, or approve itself.