To add GST in WooCommerce, first enable taxes. Go to WooCommerce → Settings → General and tick “Enable taxes,” then save. Set your store address to India. Open the Tax tab and choose whether product prices include GST. In Standard rates (or a custom “GST” class), add rows for your GST slabs, like 5%, 12%, 18%, or 28%, with Country = IN and State/Postcode if required. Save. Now edit the product, open Product data → Tax, select the correct Tax class, and set Tax status to Taxable. Update the product and test checkout totals. Add HSN code in product notes.

WooCommerce Shipping & Tax is the set of WooCommerce features that calculate delivery charges and sales taxes during checkout. Shipping lets you create zones (countries, states, zip codes), then assign methods like Flat Rate, Free Shipping, Local Pickup, or live carrier rates via plugins. You can set shipping classes, weights, and dimensions to control costs. Tax settings let you enable taxes, decide whether prices include tax, and add tax rates by location, product type, and class (standard, reduced, zero). It also prints tax totals on invoices and helps keep checkout totals accurate. Automation can pull rates and labels from services.

Variable products are a single product with selectable options (variations) like size or color. Each variation can have its own price, SKU, stock, weight, images, and shipping rules, while sharing one product page and one cart line item per chosen variation. Grouped products are a collection of separate simple products shown together on one page. Customers pick quantities for each child item and add multiple items to the cart at once. Grouped products don’t create new SKUs or variation-level settings; they simply bundle visibility and purchasing for related items. Use variable for options; use grouped for sets of independent items.

Go to WooCommerce → Settings → General, confirm your store address and currency. Scroll to “Enable taxes” and tick it, then Save changes. A new Tax tab appears. Open WooCommerce → Settings → Tax and choose whether prices include tax, how to display tax in cart/checkout, and whether shipping is taxable. Next, add tax rates: pick Standard (or create additional tax classes), click “Insert row,” then enter country/state, postcode, city, rate %, tax name, and priority. Save. Finally, place a test order to verify the correct tax shows for each location. If you sell globally, create separate rows per region.

In WordPress, go to WooCommerce → Settings → General and set your store address, currency, and selling locations. Then open WooCommerce → Settings → Tax and enable “Enable tax rates and calculations.” Choose whether prices are entered inclusive or exclusive of tax, how tax is shown in cart/checkout, and whether shipping is taxable. Create tax classes (Standard, Reduced, Zero) if needed. In each class, add rates: country/state, postcode, city, rate %, name, priority, and compound rules. Save changes. Optionally enable automated taxes using WooCommerce Tax (Jetpack) or a service like AvaTax. Place a test order to confirm totals for accuracy.

To connect to USPS or Canada Post, use a carrier integration plugin. In WordPress, go to Plugins → Add New and install the official extension (e.g., WooCommerce USPS Shipping, Canada Post Shipping Method) or a multi-carrier tool like ShipStation/Shippo. Activate it, then open WooCommerce → Settings → Shipping. Create Shipping Zones for the countries/regions you serve and add the carrier method to each zone. Enter your carrier credentials/API keys (USPS Web Tools, Canada Post Developer keys), choose services, packaging, and rate rules. Enable label printing and tracking if supported. Save, run a test checkout, and verify live rates appear for customers.