# India: GST and GSTR reports

> Set up an Indian business — state, GSTIN, HSN codes, place of supply, CGST/SGST versus IGST, reverse charge — and prepare GSTR-1 and GSTR-3B for filing.

Canonical: https://docs.getonebooks.com/tax/india/
Language: en
Documentation index: https://docs.getonebooks.com/llms.txt

Applies to businesses whose country is **India**. OneBooks records GST on every document and prepares **GSTR-1** (outward supplies) and **GSTR-3B** (summary return) in the statutory formats, with readiness checks before you file.

## What is set up for you

- Currency **INR**, tax name **GST**, default rate **18%**, tax-exclusive pricing.
- Your **state** (chosen at sign-up) decides your GSTIN prefix and whether a sale is intra-state (**CGST + SGST**) or inter-state (**IGST**).
- **GSTR Reports** under Reports.

![The state picker on the sign-up form for an Indian business](https://docs.getonebooks.com/screenshots/en/tax-in-signup-state.webp)

## Master data

- **Business GSTIN** — **Settings → Business Profile → Tax ID**.
- **Customers and suppliers** — enter their **GSTIN** in the tax ID field. Registered customers appear in the B2B section of GSTR-1; unregistered ones in B2C.

![The Add Customer dialog with the GSTIN entered in the tax ID field](https://docs.getonebooks.com/screenshots/en/tax-in-customer-gstin.webp)

- **Items** — enter the **HSN / SAC code**; it feeds the HSN summary of GSTR-1. See [Items catalog](https://docs.getonebooks.com/items/catalog/).
- **Tax rates** — add the slabs you use (0%, 5%, 12%, 18%, 28%) under **Settings → Tax Settings**.

## On documents

- **Place of supply** — the state code on each invoice and purchase. When it equals your state, the tax splits into CGST and SGST on the reports; otherwise it is IGST. The ledger always posts one combined GST amount; the split is made when the reports are generated.
- **Reverse charge (RCM)** — on purchases from unregistered or notified suppliers, switch on **Reverse Charge**; the tax is self-assessed and appears in GSTR-3B's inward RCM section.
- **Supplier GSTIN** on purchases feeds input-tax reporting.

![An inter-state invoice showing the place of supply and IGST](https://docs.getonebooks.com/screenshots/en/tax-in-invoice-place-of-supply.webp)

## Prepare the returns

1. Open **Reports → GSTR Reports** and choose the period.
2. Check **readiness**: OneBooks lists errors (missing GSTINs, HSN codes or places of supply) and warnings to fix before filing.
3. Review **GSTR-1 (Outward)** — B2B invoices, B2CL, B2CS summary, credit/debit notes and the HSN summary with totals for taxable value, IGST and CGST+SGST.
4. Review **GSTR-3B (Summary)** — outward supplies, inward RCM supplies and input tax credit.
5. **Export** as JSON for the GST portal's offline tool, or Excel for your accountant.

![The GSTR Reports page with the readiness check](https://docs.getonebooks.com/screenshots/en/reports-gstr-readiness.webp)

![The GSTR-1 preview with B2B, B2CS and HSN sections](https://docs.getonebooks.com/screenshots/en/reports-gstr-1.webp)

![The GSTR-3B preview with section totals](https://docs.getonebooks.com/screenshots/en/reports-gstr-3b.webp)

## Related

  - [Tax settings](https://docs.getonebooks.com/tax/settings/)
  - [Purchases and bills](https://docs.getonebooks.com/purchases/bills/) — Supplier GSTIN, place of supply and RCM on purchases.