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

# Invoice line items

Invoice line items represent the CFDI concepts, products, or services inside an invoice. They include product identification, description, unit amount, quantity, totals, the tax detail of each CFDI tax node with its factor type and rate or quota, and retained and transferred tax amounts by tax type.

Use invoice line items when an integration needs item-level invoice detail instead of only invoice-level totals. You can list line items for one invoice or across all invoices for an entity.

Invoice line items are extracted from invoice data. To retrieve them, run an [`invoice` extraction](https://docs.syntage.com/resources/datasources/sat/invoices#extracting-invoice-data) for the entity, then list line items after the extraction finishes.


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