The CBSA has added Bulletin 5393, found in the link on the CARM Client Portal home page:
https://ccp-pcc.cbsa-asfc.cloud-nuage.canada.ca/en/public-bulletins

Bulletin 5393 - Update on the Accounting of Vaping Products
In CARM, all excisable goods fall under specific excise tax codes in order for the relevant excise duties and/or taxes to be accounted for. Therefore, on a Commercial Accounting Declaration (CAD), when accounting for vaping products, an importer must select the appropriate excise tax code.
In the instance where the code selected is an Accept Rate type, the amount owing is to be entered in the Excise Duty amount field. Any amount entered in the Excise Tax amount field will not show on the submitted CAD, as it expects the data in the Excise Duty amount field.
For a full list of applicable codes and their rate types, please see section “Vaping products” in Memorandum D18-5-1: Coding Excise and GST Exemption Codes in the CBSA Assessment and Revenue Management (CARM) System.
Please note that Memorandum D18-3-2: Excise Duty Framework for Vaping Products, is in process to be updated to reflect these changes.