# BR-CO-26 — Seller tax identifier missing

> https://billhorse.com/en/rules/br-co-26/

## What does this error mean?

The seller needs a VAT identifier (BT-31) or tax registration (BT-32).

## How to fix it

UBL: PartyTaxScheme/CompanyID (TaxScheme VAT for BT-31, FC for BT-32). CII: SpecifiedTaxRegistration/ID with schemeID VA or FC.