Make sure your rest of the world to Northern Ireland declarations are successfully submitted on the Customs Declaration Service

Communication from HMRC to provide guidance on how to ensure your rest of the world (RoW) to Northern Ireland (NI) declarations are submitted successfully on the Customs Declaration Service (CDS) in the following scenarios.
If you use preference, valuation methods 2, 3, 4, 5 or 6, or authorised-use relief arrangements, there are steps you may need to take to ensure your declaration is accepted.

Source HMRC