How to set up sales tax on shopify?

To set up sales tax on Shopify: go to Settings > Taxes and duties in your Shopify admin, add the regions where you have nexus, and enable automatic tax calculation. Shopify Tax (or Avalara/TaxJar via integration) then applies the correct rate at checkout. For international VAT and duties on cross-border orders, Swap's Global app handles calculation and remittance automatically.