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

> ## Agent Instructions
> Automate.ax automations are TypeScript programs.
> Use Bun for installation and command examples.
> Use Automate.ax for the product name and automate.ax for the package, CLI, and domain.
> Treat documented public APIs as current; do not invent transitional or deprecated names.

# Update Inventory Adjustment Reason

> Updates a custom inventory adjustment reason.

`square.updateInventoryAdjustmentReason` updates a custom inventory adjustment reason.

## Example

```ts automations/square-update-inventory-adjustment-reason.automation.ts theme={null}
import { automation, onDashboardRun } from "automate.ax"
import { square } from "automate.ax/square"

export default automation("Update Square Inventory Adjustment Reason", () => {
  onDashboardRun({ title: "Update Square Inventory Adjustment Reason" })

  square.updateInventoryAdjustmentReason({
    reasonId: {
      type: "CUSTOM",
      customReasonId: "R5BX3PDCZ6EXAMPLE",
    },
    adjustmentReason: {
      id: {
        type: "CUSTOM",
        customReasonId: "R5BX3PDCZ6EXAMPLE",
      },
      name: "Charitable donation",
    },
  })
})
```

## Inputs

Every input accepts a compatible signal. It requires `INVENTORY_WRITE`.

| Field              | Type                                 | Required | Default | Description                                                                                                                                                                                                         |
| ------------------ | ------------------------------------ | -------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `reasonId`         | `Square.InventoryAdjustmentReasonId` | Yes      | —       | The identifier of the custom inventory adjustment reason to update.                                                                                                                                                 |
| `adjustmentReason` | `Square.InventoryAdjustmentReason`   | Yes      | —       | The requested custom inventory adjustment reason update. Only the `name` field can be updated. Deleted custom reasons cannot be updated. To restore a deleted custom reason, call RestoreInventoryAdjustmentReason. |

Use the official [UpdateInventoryAdjustmentReason reference](https://developer.squareup.com/reference/square/inventory-api/update-inventory-adjustment-reason) for provider field semantics and limits.

## Output

Returns the official `Square.UpdateInventoryAdjustmentReasonResponse` response as a codec-safe object. Square integer money amounts remain `bigint` values.