errorEN16931
UBL-SR-48:Invoice lines shall have one and only one classified tax category.
Your invoice line has an incorrect number of ClassifiedTaxCategory elements. Each invoice line must have exactly one tax category classification - not zero, not multiple.
Why This Error Matters
Invoice will be rejected. Tax categorization per line is mandatory for VAT calculation and reporting.
Common Causes
- Invoice line created without assigning a tax category
- Multiple tax categories assigned to a single line item
- ERP export missing tax classification for some products
- Template does not enforce single tax category per line
- Tax category element accidentally duplicated or removed
Frequently Asked Questions
Your invoice line has an incorrect number of ClassifiedTaxCategory elements. Each invoice line must have exactly one tax category classification - not zero, not multiple.
Your invoice line has an incorrect number of ClassifiedTaxCategory elements. Each invoice line must have exactly one tax category classification - not zero, not multiple. You can also use Invoice Navigator's automatic Fixer tool to correct this instantly.
Yes, UBL-SR-48 is a critical error that will cause invoice rejection. It must be fixed before submission to ensure your invoice is accepted.
Many instances of UBL-SR-48 can be automatically corrected using Invoice Navigator's Fixer tool. Upload your invoice and the tool will identify and fix common issues.
See Also
Last updated: 16 January 2026
Share this guide: