The Immediate Supply of Information (SII) version 1.1 has been updated to version 1.1-Bis. The changes will be effective from January 1, 2021. The Spanish tax administration, the AEAT, has introduced new fields required for sales under the consignment of goods regime. The ledger of invoices issued, and the ledger of invoices received are also affected by the changes introduced. The AEAT published new schemas, WSDL files, and other technical documentation for this SII version 1.1-Bis, available here.