BBC News
By John Campbell
Published
image captionThe Goods Vehicle Movement Service (GVMS) will be key for hauliers and logistics companies
Two key IT systems to facilitate trade between Great Britain and Northern Ireland from 1 January are now operational.
However, many businesses in NI are still concerned about how the entire process will work.
From 1 January all commercial goods coming from GB to NI need a customs declaration. Food products will also undergo additional checks and controls.
Many businesses also need to use a new trusted trader scheme.
This is to ensure their imports from GB will not face EU tariffs.