TaxExtension is a child object of the Documents object. It stores fiscal IDs of marketing documents. Every marketing document has a set of fiscal IDs.
The TaxExtension object is applicable for cluster B (country-specific for Brazil and India).
Source tables: CPI12, CPV12, CSI12, CSV12, DLN12, DRF12, IGE12, IGN12, INV12, PCH12, PDN12, POR12, QUT12, RDN12, RDR12, RIN12, RPC12, RPD12, and WTR12.