---
id: ADR-ACC-BKS-010
title: Tax configuration remains a transitional Accounting responsibility
product_area: accounting
module: books
revision: 1
status: proposed
design_intent: open
source_sha:
  services-accounting: f47cb263875bbc0c5640fba7dae6785ec32695f8
  react-console: baf6dae382d6f41dce976c7f848667ccc37e076f
decision: >-
  Classes, zones and rates remain editable in Accounting while the transfer is
  unresolved. Rate-to-unit payable mappings remain embedded in rate setup;
  Accounting retains the financial mapping and document tax responsibilities.
constrains:
  - DOM-ACC-BKS-002
  - DOM-ACC-BKS-006
  - SVC-ACC-BKS-books
  - WF-ACC-BKS-006
  - SCR-ACC-BKS-011
  - SCR-ACC-BKS-012
origin: >-
  services-accounting docs/architecture/accounting-2.0/02-decisions.md#R-1
  (Andrew: Commerce owns determination and configuration; Accounting keeps the
  financial treatment); OQ-ACC-BKS-001; OQ-ACC-BKS-005
alternatives:
  - option: Immediately make Accounting tax setup read-only.
    why_not: >-
      No examined replacement and transfer contract establishes how existing
      users would maintain setup.
  - option: Separate payable mapping before the transfer.
    why_not: >-
      This is a proposed direction, not an implemented migration; Product must
      settle it with the transfer plan.
consequences:
  - >-
    The observed ownership overlap remains an open disagreement with the
    realignment.
  - >-
    Replacing a zone creates new rate identities and can lose payable
    destinations for earlier issued tax lines.
  - >-
    The configuration screens remain in Accounting at the pinned console
    revision.
supersedes: []
evidence:
  - >-
    services-accounting at f47cb263:
    docs/architecture/accounting-2.0/02-decisions.md#R-1
  - >-
    services-accounting at f47cb263:
    modules/books/services/persistence/tax-zones.ts
---

# Tax configuration remains a transitional Accounting responsibility

## Context

The product realignment assigns tax determination and configuration to Commerce while retaining financial treatment in Accounting. The pinned implementation still offers editable Accounting tax setup.

## Decision

Classes, zones and rates remain editable in Accounting while the transfer is unresolved. Rate-to-unit payable mappings remain embedded in rate setup; Accounting retains the financial mapping and document tax responsibilities.

## Alternatives Considered

Immediately make Accounting tax setup read-only. No examined replacement and transfer contract establishes how existing users would maintain setup.

Separate payable mapping before the transfer. This is a proposed direction, not an implemented migration; Product must settle it with the transfer plan.

## Consequences

The observed ownership overlap remains an open disagreement with the realignment.

Replacing a zone creates new rate identities and can lose payable destinations for earlier issued tax lines.

The configuration screens remain in Accounting at the pinned console revision.