Guide · Updated May 2026
Markdown exportLine item and unit code problems
Every e-invoice line needs enough structured information for the recipient system to understand what was sold and how the amount was calculated.
What you may see
Use these points as the practical checks for this section.
- Item name is required
- Invoiced quantity is required
- Unit of measure is required
- Unit code is not in the standard list
- Line extension amount is required
- Price amount must be non-negative
- Calculated line amount does not match
- Line service period end date is before start date
What this means
Every e-invoice line needs enough structured information for the recipient system to understand what was sold and how the amount was calculated.
What to check
Use these points as the practical checks for this section.
- Description or item name
- Quantity
- Unit of measure
- Unit price
- Net line amount
- VAT category and rate
- Service period, if the line covers a period