Updated on 7 October 2026
Invoice description in the SII: what Ubyquo reports
With Sage and A3, Ubyquo reports the contra account (for example, “Purchases of goods”) as the invoice description.
When an invoice is sent to the SII (Suministro Inmediato de Información, the AEAT's immediate VAT reporting system) of the AEAT (Spanish Tax Agency), one of the items the specification requires is the description of the transaction, that is, the invoice description.
It is a mandatory field, although in practice the Spanish Tax Agency barely uses it.
What do ERPs usually enter?
Many ERPs fill in the description with something like “Invoice no. 1234 from Supplier S.L.”. That information adds nothing: the invoice number, the supplier and the customer are already sent in their own fields.
What does Ubyquo report?
Ubyquo sends the name of the contra account as the description, which indicates the nature of the expense or income. For example:
- An invoice posted to account 600 is reported with the description “Purchases of goods” (Compras de mercaderías).
This way the description truly describes the transaction, instead of repeating data that is already on the invoice.
With which ERPs?
- Sage and A3 (A3ECO / A3CON): Ubyquo reports the description using the contra account.
- All other ERPs: the SII works normally; the description is whatever the ERP itself enters.