--- title: "India GST, e-invoice and e-way bill: find your answer" space: "ERPNext" url: "https://docs.frappe.io/erpnext/india-gst-help" updated: "2026-10-21" --- GST, e-invoice, e-way bill, TDS and the GST returns in ERPNext come from the **India Compliance** app. Its full documentation is at [docs.indiacompliance.app](https://docs.indiacompliance.app/docs/getting-started/introduction). This page lists the questions support receives most often, with a short answer and a link to the full one. ## Setup **How do I set up GST?** Install India Compliance, then set the company's GSTIN on its address, the GST accounts in **GST Settings → Accounts**, and the tax templates. [GST setup](https://docs.indiacompliance.app/docs/configuration/gst_setup) **How do I turn on e-invoice and e-way bill?** In **GST Settings → General**, turn on **Enable API Features**, **Enable e-Invoicing** and the e-way bill options, then add credentials. [GST Settings](https://docs.indiacompliance.app/docs/ewaybill-and-einvoice/gst_settings) **Do I pay for the GST APIs?** On Frappe Cloud, API access is included, as long as the site is not logged in to an India Compliance Account. On a self-hosted site, you buy credits. [GST API errors: credentials, GSTIN, "API credits exhausted"](/erpnext/gst-api-credentials-and-credits) **One company with GST registrations in several states?** Add an address with its GSTIN for each state. Transactions pick the GSTIN from the company address. [GST for multiple branches](https://docs.frappe.io/erpnext/gst-for-multiple-branches) **HSN codes, and the HSN validation?** Set the HSN/SAC code on each item. GST Settings can require it and check its length. [GST setup: HSN codes](https://docs.indiacompliance.app/docs/configuration/gst_setup) **New Income Tax Act 2025 TDS and TCS sections?** Update India Compliance to get the new Tax Withholding Categories, then select them on suppliers. [TDS setup](https://docs.frappe.io/erpnext/tds-setup-india) ## GST on invoices **Why is GST wrong, missing, or a few paisa off?** Usually Place of Supply, GST accounts, the Item Tax Template setting or rounding. [Why is GST wrong or missing on my invoice?](/erpnext/gst-wrong-on-invoice) **Reverse charge (RCM) purchases?** Add the reverse charge accounts in GST Settings and mark the purchase invoice as reverse charge. [Reverse charge](https://docs.indiacompliance.app/docs/configuration/purchase_transaction) **Ineligible input tax credit?** India Compliance moves ineligible GST to the company's **Default GST Expense Account**. [ITC ineligibility](https://docs.indiacompliance.app/docs/configuration/purchase_transaction) **Exports, SEZ, nil-rated and zero-rated supplies?** Turn on **Enable SEZ / Overseas Transactions** in GST Settings and set the customer's GST Category to Overseas or SEZ. [Sales transactions](https://docs.indiacompliance.app/docs/configuration/sales_transaction) **GST on advance payments, and reversal of ITC?** [Other GST transactions](https://docs.indiacompliance.app/docs/configuration/other_transaction) **Input Service Distributor (ISD)?** [ISD](https://docs.indiacompliance.app/docs/configuration/input_service_distribution) ## e-Invoice **e-Invoice shows Failed, has no IRN, or cannot be cancelled after 24 hours?** [e-Invoice shows Failed, has no IRN, or cannot be cancelled](/erpnext/e-invoice-failed-or-cancel) **How do I generate or cancel an e-invoice?** [Generating e-Invoice](https://docs.indiacompliance.app/docs/ewaybill-and-einvoice/generating_e_invoice) **Credentials or "API credits exhausted" errors?** [GST API errors](/erpnext/gst-api-credentials-and-credits) **Testing without real invoices?** Use sandbox mode. [Sandbox](https://docs.indiacompliance.app/docs/developer-guide/sandbox) ## e-Way bill **Generate, update Part B or the vehicle, extend, cancel, or for stock transfers and job work?** [e-Waybill](https://docs.indiacompliance.app/docs/ewaybill-and-einvoice/generating_e_waybill) **Address, PIN code or HSN errors when generating?** [Transaction validations](https://docs.indiacompliance.app/docs/miscellaneous/transaction_validations) ## GST returns **An invoice is missing from GSTR-1, or totals do not match?** [Why is my invoice missing from GSTR-1, or why don't the totals match?](/erpnext/gstr-1-missing-or-mismatch) **Generate, compare and file GSTR-1?** [GSTR-1](https://docs.indiacompliance.app/docs/gst-reports/gstr1) **GSTR-3B, and why can't I change an invoice after GSTR-3B is filed?** India Compliance sets the ITC Claim Period and blocks changes to periods already filed. [GSTR-3B and ITC Claim Period](https://docs.indiacompliance.app/docs/gst-reports/gstr3b) **Match purchase invoices with GSTR-2A and GSTR-2B?** [Purchase Reconciliation](https://docs.indiacompliance.app/docs/purchase-reconciliation/reconciling_purchase) **Invoice Management System (IMS)?** [GST IMS](https://docs.indiacompliance.app/docs/gst-reports/gst_ims) **GSTR-9, GSTR-6 or GSTR-7?** Not generated by India Compliance. Use the GST reports (GST Sales Register, GST Purchase Register, GST Balance) as the base, and file on the GST Portal. [GST reports](https://docs.indiacompliance.app/docs/gst-reports/miscellaneous_reports) ## Errors after an update or a site move **TypeError or other errors after updating ERPNext or India Compliance?** The apps must be on matching versions: update both to the latest release of the same major version (for example both version-16). [Errors after an update](https://support.frappe.io/helpdesk/kb-public/articles/lccj8lm36) **Encryption key error after moving the site?** Enter the GST credentials again. [Encryption key error after moving a site](https://support.frappe.io/helpdesk/kb-public/articles/34o9v7121) ## Related - [India Compliance app](https://docs.frappe.io/erpnext/india-compliance-app) - [India Compliance documentation](https://docs.indiacompliance.app/docs/getting-started/introduction)