> ## Documentation Index
> Fetch the complete documentation index at: https://developers.pleo.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Chart of Accounts Sync Data Mapping

This page describes how data from the Accounting System is mapped to Pleo's Chart of Accounts API during Chart of Accounts Sync.

Data mapping ensures that Chart of Accounts entries from the AS are reflected accurately in Pleo's Accounts.

## Implementation

* [Chart of Accounts Sync Workflow Guide](/docs/current/guides/accounting-integrations/imports/accounts-sync-workflow-guide): workflow context and sequencing
* [How to Sync Accounts](/docs/current/how-tos/accounting-integrations/imports/accounts/how-to-sync-accounts): API usage and step-by-step instructions

## Accounts: Data Mapping

Map the following datapoints from AS accounts to Pleo Chart of Accounts API fields.

| Pleo Chart of Accounts API Field | AS Account Datapoint                                                                                                                                                                                                         |
| -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `externalId`                     | Unique long-lasting identifier of the account in the AS. This is the **source of truth** identifier used for matching.                                                                                                       |
| `code`                           | The user-facing account number of the Chart of Accounts entry. Displayed to users to help them identify and select the correct account.                                                                                      |
| `name`                           | Name of the Chart of Accounts entry                                                                                                                                                                                          |
| `taxCodeExternalId`              | The identifier in the AS for the tax code associated with the account. Stored as a reference only. Pleo **does not** automatically link this to a Tax Code, apply it to expenses, or update any category's default tax code. |
| `archived: false`                | Use when creating new active Accounts or unarchiving existing Accounts                                                                                                                                                       |
| `archived: true`                 | Use when archiving Accounts that no longer have a matching active account in the AS                                                                                                                                          |

## Matching Field

Accounts are matched to their AS counterparts using the **`externalId`** field on both ends.

The `externalId` is a stable, long-lasting identifier assigned by the Accounting System. It does not change when an account's name or code is updated, making it reliable for matching across sync runs.

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## What Comes Next?

* [Chart of Accounts Sync Periodicity and Scheduling](/docs/current/integration-design/accounting-integrations/imports/accounts/integration-design-accounts-periodicity)

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## Related Reading

* [Sync Accounts](/docs/current/integration-design/accounting-integrations/imports/accounts/integration-design-accounts-sync)
* [Chart of Accounts Sync Workflow Guide](/docs/current/guides/accounting-integrations/imports/accounts-sync-workflow-guide)
* [Platform Capabilities: Chart of Accounts Sync](/docs/current/platform/accounting-integrations/imports/accounts/accounts-sync-overview)

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