Add tax classification code to AR invoices - e-invoicing requirement

Hi Team,

The customer needs the APRO system to include UNCL5305 tax classification codes on AR invoice lines for e-invoicing compliance. Currently, tax classifications are not recorded, only tax rates are calculated. They require default tax classification codes (S, L, or K) to be added to all AR invoice lines from all sources without changing existing tax calculations, potentially defaulted at the customer site level.

Could you please provide any document on this.

For example Tax rate code is FR_EU_ICS_00_FA then the Tax classification will be K. Could you please let us know how to achieve this. How to filter under tax determinants AR line level based on DFF Tax classification K.