GOV.UK
Government website GOV.UK contains a huge amount of post-transition Brexit-related information, including guidance on importing goods into the UK from the EU, exporting goods to the EU from the UK, moving goods into, out of, or through Northern Ireland, living and working in the EU and travelling to EU countries.
You’ll also find detailed guidance on import, export and customs rules, some of which has changed significantly since 1 January 2021. If you’re new to importing and exporting, you’ll need to get an EORI number to move goods between England, Scotland and Wales or the Isle of Man and other countries. You may also need a separate EORI number if you move goods to or from Northern Ireland.
You can use the Brexit checker tool on GOV.uk to get personalised post-transition Brexit actions for your business.