---
url: /gst-manager-whmcs/faq.md
description: >-
  Answers to common GST Manager questions — tax rules, B2B vs B2C, GSTR-1
  filing, export/FEMA invoices, invoice numbering, GST PDFs, dashboard widgets,
  SAC codes, license lapses, data retention, updates, per-currency bank details,
  and invalid GSTINs.
---

# FAQ

Short answers to the questions Indian WHMCS owners ask most. New to the vocabulary? **GSTIN** is
your 15-character GST registration number; **IGST/CGST/SGST** are the inter-state/central/state
parts of GST; **SAC** codes classify services for tax; **Purpose Codes** (RBI) classify export
payments; **B2B/B2C** distinguish clients who have a GSTIN from those who don't.

## Does it set up my GST tax rules automatically?

Yes. During the [setup wizard](/gst-manager-whmcs/features/setup-wizard) (step 3) — or later under
**System Setup → Tax & GST** — GST Manager generates the WHMCS tax rules for you: **IGST 18%** for
India and **CGST 9% + SGST 9%** for your registered state.

## What's the difference between B2B and B2C?

**B2B** is a client who has a **GSTIN**; **B2C** is one who doesn't. GST Manager classifies your
paid Indian invoices automatically for the GSTR-1 report. See
[Tax reports](/gst-manager-whmcs/features/tax-reports).

## Can I file GSTR-1 from this?

You can produce the data you need. **Addons → GST Manager → Tax Reports** gives you a **GSTR-1
Export (B2B/B2C Classification)** CSV for paid Indian invoices over any date range, suitable for
GSTR-1 filing. You still file through the GST portal.

## Does it handle export invoices and FEMA?

Yes. Export-invoice compliance — **FEMA** declarations (India's foreign-exchange rules),
export-specific numbering and formatting — is configured under **System Setup → Export Settings**.
There's also an **Export Invoices CSV** report with Purpose Code and SAC per line item.

## Will it change my existing invoice numbering?

GST Manager uses WHMCS's **Sequential Numbering** (e.g. `INV-20251001`) and adds separate
export-invoice numbering for export clients. It doesn't rewrite invoices you've already issued —
review your preferences under **System Setup → Invoicing** and
[Export Settings](/gst-manager-whmcs/settings).

## Are my invoices GST-format PDFs?

Yes — GST Manager deploys GST-formatted invoice templates carrying your **GSTIN**, SAC/Purpose
codes and per-currency bank details. Deployment is handled in the wizard's last step and can be
re-run from **Global Settings → Sync Status**.

## What are the dashboard widgets and why April–March?

GST Manager adds three WHMCS admin-home widgets — **Billing**, **GST Collected**, and **GST
Compliance Health** — reporting on the Indian **financial year (1 April – 31 March)** rather than
the calendar year, because that's the period Indian GST/income reporting uses. They appear only
while your license is active.

## Do I need to configure SAC codes?

Defaults ship per service type, so you can start immediately. To fine-tune which **SAC** and
**Purpose Code** appear on specific products, use **Addons → GST Manager → Item Rules**.

## What happens if my license lapses?

Your invoicing, reports and installed version keep working. The **client-area bank-details**
feature is license-gated and stops showing until a successful check; for a **Lifetime** license,
only **Update Now** is blocked when Support & Updates lapses. See
[Licensing](/gst-manager-whmcs/licensing).

## Is my data kept if I deactivate?

Yes. Deactivating preserves your database tables (config and reports data), so a
deactivate/reactivate is lossless. To remove everything permanently you'd drop the `mod_gst_*`
tables manually — see [Uninstalling](/gst-manager-whmcs/uninstalling).

## How do updates and backups work?

One-click via **Global Settings → Update Status → Check for Updates → Update Now**. GST Manager
backs up files and the database first and auto-restores on failure. A **database backup** is
retained and downloadable under **Update Status → Database Backups** — store it privately, as it
includes configuration and licence details.

## Can I show different bank details per currency?

Yes. Configure remittance/bank details **per invoice currency** under **System Setup → Bank
Details**, so each currency's invoices show the right account.

## What if my GSTIN is invalid?

The wizard's step 3 blocks on a bad GSTIN and shows it in **red** — enter a valid **15-character**
GSTIN and pick your registered state. The **GST Compliance Health** widget also flags malformed
supplier or client GSTINs. See [Troubleshooting](/gst-manager-whmcs/troubleshooting).

## Do I need an active WHMCS store selling to India?

Yes — GST applies to India, so GST Manager is built for a WHMCS store billing Indian customers.
Check [Requirements](/gst-manager-whmcs/requirements) before installing.

## Still have a question?

Browse [Troubleshooting](/gst-manager-whmcs/troubleshooting), the
[error reference](/gst-manager-whmcs/errors), or email `support@relyweb.co`.