[stuaxo]

https://github.com/uktrade/tamato/

This is a Django based tool to manage the tax rates you pay on any thing you might trade with the UK.

It can handle all the changes to the tax from the founding of the EU, through past Brexit when the UK has its own tariff as well.

Running it locally, it may not be straightforward to get hold of the right data (you can download it, but I don't think it's a turn key thing).