> ## 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.

# Tax retentions

Tax retentions represent SAT CFDI withholding and payment-information documents. They include the issuer, receiver, retention code, fiscal period, operation totals, retained tax totals, itemized retained taxes, and CFDI file availability.

Use the list endpoint to read tax retentions extracted for an entity. Use the CFDI endpoint when you need the XML or PDF content for a specific tax retention.

## How tax retention data is collected

Tax retention records are collected with the `tax_retention` extractor. After the extraction finishes, the resulting records are available from the entity tax retention list.

For implementation details, see [Extraction request examples](/developers/extraction-request-examples#tax-retentions).