| Tax account inventory | Relevant accounts, entities, tax types, owners, systems, and reporting periods | Workbook or controlled register | Discovery | Chart of accounts, tax calendar, entity list |
| Data and tax-code mapping | Source fields, account mappings, tax codes, return lines, and known exceptions | Mapping schedule | Assessment | System exports, configuration notes, policies |
| Tax account roll-forward | Opening balance, period activity, adjustments, payments, refunds, and closing balance | Workbook or system report | Reconciliation | Trial balance, journals, prior workpapers |
| Ledger-to-return bridge | Comparison of booked amounts with return calculations and reported lines | Bridge schedule | Reconciliation | Draft or filed return, calculation reports |
| Payment and refund matching | Authority payments, refunds, credits, bank items, and ledger postings | Matching schedule | Reconciliation | Bank data, payment confirmations, statements |
| Exception register | Variance category, value, period, owner, status, evidence needed, and target action | Issue tracker | Analysis | Owner responses and supporting records |
| Adjustment support | Proposed entry logic, references, supporting calculation, and approval status | Adjustment register | Resolution | Accounting policy and approver decision |
| Review and sign-off pack | Completed workpaper, evidence index, reviewer notes, approvals, and open items | Controlled digital pack | Quality assurance | Reviewer sign-off and escalation decisions |
| Process documentation | SOP, RACI, control checklist, thresholds, cadence, and handover notes | Document and workflow map | Handover | Process owner review and approval |