---
url: /gst-manager-shopify/features/invoices.md
description: >-
  How GST Manager issues GST tax invoices and credit notes on Shopify —
  CGST/SGST/IGST breakdown, Proforma flow for B2B, branding, immutability, and
  refunds.
---

# Invoices & credit notes

GST Manager automatically generates compliant, professionally branded **GST Tax Invoices** for every paid order, and **Credit Notes** whenever an order is refunded.

![Sample GST Tax Invoice PDF showing branding, party blocks, and CGST/SGST breakdown](/gst-manager-shopify/img/gst-manager-shopify-invoice-pdf-sample.png)
*Apps → GST Manager → Orders → Download GST Invoice*

## How GST is calculated

The app uses an always-tax-inclusive pricing model (MRP):

* **Product prices already include tax.** The app back-calculates the taxable value and GST component so the invoice total matches the exact amount charged.
* **Intra-state sales** (same state as your dispatch location) split evenly into **CGST + SGST** (e.g. 9% + 9% for an 18% item).
* **Inter-state sales** (different state) are charged as **IGST** (e.g. 18%).
* Each line item on the invoice displays its **HSN/SAC code**, taxable value, GST rate, and split tax amounts.

## When invoices are generated

| Order type | Workflow |
| --- | --- |
| **Standard B2C / Retail** | Tax Invoice is created immediately when the order is placed (`orders/create`) |
| **B2B Company order** | Issued as a **Proforma invoice** first; converted to a final **Tax Invoice** upon fulfillment or payment |

::: tip Manual generation
If webhooks are delayed, click **Generate now** on any order detail page inside the app to create the invoice on demand.
:::

## PDF layout & customization

Configure your invoice template under **Apps → GST Manager → Settings → Invoice Configuration**:

* **Logo & Signature** — upload your brand logo and an authorized signatory image (PNG/JPG up to 200 KB).
* **Party details** — clean three-column layout showing Supplier, Bill To, and Ship To with full addresses, GSTINs, and state codes.
* **Amount in words** — automatically converted into standard Indian numbering format (Lakhs and Crores).
* **MRP column** — optionally display the original Compare-at price alongside the selling price.
* **Custom disclaimer** — add bank details, payment instructions, or legal terms in the footer.
* **Date & currency formatting** — pick your preferred format (e.g. `DD-MM-YYYY`, `₹ 1,234.50`).

## Invoice immutability (Pro plan)

To maintain a clean audit trail:

* When **Lock invoice contents at issuance** is enabled, the app captures an unchangeable snapshot of the customer name, address, and item prices at the exact moment the invoice is created.
* Subsequent changes made to the order in Shopify will not alter the original issued invoice.
* If a genuine correction is needed, click **Regenerate** on the order page to refresh the document details while keeping the original invoice number and date.

## Partial shipments & credit notes

* **Per-fulfillment invoices (Pro):** If you fulfill orders in multiple shipments, you can enable separate tax invoices for each partial dispatch.
* **Credit notes:** When an order is refunded in Shopify, the app automatically generates a numbered **Credit Note** (e.g. `CN-0001`) reflecting the refunded amounts and reversed tax liability.

## How to download invoices

1. **From Shopify admin:** Open any order in **Apps → GST Manager → Orders** and click **Download**.
2. **From order list:** Select multiple orders on the Orders page and click **Print invoices** to download a single ZIP archive.
3. **By customers:** Shoppers can click **Download invoice** directly from their customer account page on your store.
4. **By email:** Enable automated email delivery to send invoices as PDF attachments.

## Related pages

* [Capturing the GSTIN](/gst-manager-shopify/features/gstin-capture) — collecting buyer tax IDs
* [GST reports](/gst-manager-shopify/features/reports) — filing monthly returns
* [Customer downloads](/gst-manager-shopify/features/customer-downloads) — self-serve invoice downloads
* [Settings reference](/gst-manager-shopify/settings) — full numbering and branding options