How do I set up sales tax or GST in WooCommerce?

To set up sales tax or GST in WooCommerce, go to WooCommerce → Settings → General and enable “Enable tax rates and calculations.” Save changes. Then open WooCommerce → Settings → Tax. Choose whether prices are entered with or without tax and set how tax shows in the cart and checkout. Next, click Standard rates (or create a GST tax class) and add your tax rules. Enter Country, State, Postcode, City, Rate %, Tax name (GST/VAT), Priority, Compound, and Shipping tax option if required. Save. Finally, place a test order to confirm correct tax calculation.