How can I correctly set up tax rates for Ireland and Northern Ireland on Shopify?

Hi, just to confirm Ireland is in the EU… the UK left the EU, so Ireland tax rules will be the same as all EU countries. I have the reverse problem we are based in Ireland (26 counties) and can sell to Northern Ireland but not the UK currently (DPD stopped delivering to UK). Is it possible to set up a separate zone for Northern Ireland, England, Scotland and Wales?