This part of GOV.UK is being rebuilt – find out what beta means

HMRC internal manual

Debt Management and Banking Manual

Pre-enforcement: coding out: class 2 NIC debts: updates to IDMS - debt

Once the taxpayer and debt details are sent to IDMS, any debt or designatory detail updates will be automatically sent from NPS(NI) to IDMS.

There is, however, no interface between IDMS and NPS(NI) and any changes to designatory details on IDMS should be made using NPS(NI).