GST Invoice in WooCommerce

Do the setup in wp-admin before a real customer pays, and stop when two test PDFs show your GSTIN and exactly one kind of tax split each. Work top to bottom:

1. Open WooCommerce → Settings → General. Set the store state to the state on your GST registration, tick Enable tax rates and calculations, and save.
2. Open the Tax tab. Set Prices entered with tax to "No, I will enter prices exclusive of tax". Set Calculate tax based on to the customer shipping address when you ship goods, or the billing address when that is your place of supply. Save.
3. Open Plugins → Add New, search for a GST invoice plugin, install and activate it, then enter your GSTIN in its GST or invoice settings. If those fields are missing, deactivate it and pick one that shows GSTIN, HSN and CGST or IGST.
4. Edit each product: enter the HSN for goods or the SAC for a service, set the slab if the plugin asks, and update.
5. Place two test orders — one with an address in your state, one in another state — and download both invoice PDFs.

It worked when the home-state PDF shows CGST and SGST, each half the slab, and the other PDF shows only IGST at the full slab. If both PDFs list every tax, a rate row with a blank state is stacking on the state rate — delete that extra row and rerun the two orders. Taking the payment is a separate setup; Razorpay in WooCommerce does not choose CGST or IGST for you.

Tax settings do the calculation; a GST invoice plugin writes the Indian-format PDF and fills the rate rows so you do not add every state by hand. Neither replaces the other:

Stay on native rates only if you sell into one or two states and already have a PDF tool: add two rows for your state (CGST and SGST) with compound turned off so the second rate does not tax the first, plus a separate IGST row per other state — and never leave the state cell blank, because a blank state matches every state and stacks tax. Use a plugin when orders leave your state. Plugin pricing is the vendor's, not ours; WooCommerce hosting is the account the shop runs on, and support@webji.services quotes accounts by email — the office number is not a support line.

Read both test PDFs line by line before sending one to a paying customer — the split, the GSTIN and the codes, not just the total. The pass checklist:

• Home-state order: CGST and SGST, and no IGST line.
• Other-state order: IGST only, at the full slab.
• Both PDFs: your current GSTIN, plus an HSN or SAC on every line.
• Arithmetic: taxable value plus tax equals what the customer paid.

A wrong rate usually means the product sits in the wrong tax class — standard rates are the default class, so give a reduced slab its own class and rows, then repeat the two test orders. Two boundaries: if your CA says e-invoicing applies to you, the government IRP document is a separate file and this PDF does not replace it; and the monthly return is separate too — export the orders for your CA. This setup stops at the invoice the customer receives.