HMRC has published detailed data element completion instructions for Customs Declaration Service (CDS) Customs Clearance Requests (CCRs), which handle inventory releases for import declarations previously known as C21 forms. These instructions provide guidance specific to CDS BIRDS declarations and apply exclusively to import-related customs clearance processes. The guidance assists customs agents and importers in correctly completing the required data fields when submitting import declarations through the CDS system.
Source: HMRC (GOV.UK) – Read the original