As of this month there have been new VAT rules from the European Union regarding goods shipped to the EU as imports. If you are a creator shipping in the EU to EU patrons, you’ll need a EU VAT number, and if you are a non-EU creator sending to EU patrons you’ll need a IOSS number (for Patreon, our issuing country is Ireland). For Non-UK creators sending to patrons in the UK you’ll need a VAT number.
More information along with these numbers are outlined here in the article below, along with some details regarding popular shipping couriers: