## Documentation Index

Access the complete documentation index at:
https://www.zoho.com/en-fr/books/kb/llms.txt

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# How do I migrate to the new line\_items structure to use Headers via API?

You can [add headers](/books/help/invoice/other-actions.html#insert-headers-as-line-items) as rows in the _Item Table_ when you create transactions in Zoho Books. Headers add a title to group related items.

You can add headers in the following transactions:

**Sales:** Quotes, Sales Orders, Sales Receipts, Invoices, Recurring Invoices, and Credit Notes.

**Purchases:** Purchase Orders, Bills, and Vendor Credits.

Previously, for API users, every entry in the `line_items` array represented a regular item. The same array now also includes header rows, identified by a new field called `line_item_category`. Items and headers are ordered by `item_order`.

If you want to create, update, or read transactions with headers via the API, update your payloads to the new structure.

**Insight:** This migration is needed only if you want to use headers via the API. Your existing integrations will continue to work without any changes.

Key changes in the `line_items` structure:

*   `line_item_category` accepts `header`. Regular items can omit this field.
*   `item_order` sets the position of the row in the _Item Table_.
*   Header rows need only `description`, `item_order`, and `line_item_category: "header"`.
*   GET responses include header rows in `line_items`. If your code assumes every entry is an item, add a check on `line_item_category` to skip or handle these rows.

**Note:** Refer to the Zoho Books API docs for the [updated `line_items` schema](https://www.zoho.com/books/api/v3/invoices/#create-an-invoice). For further assistance, reach out to our support team at [](mailto:support@zohobooks.com)[support@zohobooks.com](mailto:support@zohobooks.com).