## Documentation Index

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

Use this file to discover all available documentation pages before proceeding.

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# Is it possible to convert a quote into an invoice using Zoho Books API?

No, it is not possible to convert a quote into an invoice using API.

However, while creating an invoice using the API, you can link it to an existing quote. To establish this link, use the [create an invoice](https://www.zoho.com/books/api/v3/invoices/#create-an-invoice) API and pass the **estimate\_id** in the JSON string.

Visit the [Zoho Books API Documentation](https://www.zoho.com/books/api/v3/introduction/#organization-id) for more information.