GST Return Terms and Meanings: Complete GSTR Glossary
Key Takeaways
- This glossary explains every term used in GST returns in plain English, with an example and the common mistake for each.
- The core monthly cycle is GSTR-1 (outward sales) and GSTR-3B (summary + tax payment), reconciled against GSTR-2B (auto-drafted input tax credit).
- ITC (Input Tax Credit) is the heart of GST; it can be claimed only on invoices appearing in your GSTR-2B and within the time limit.
- The supply types confuse most people: Zero-rated (exports/SEZ, refund allowed), Nil-rated (0%), Exempt (no tax, no ITC), and Non-GST are all different.
Who should read this: New GST registrants, small business owners, accountants, and anyone decoding the GST portal.
Reading time: ~14 minutes · Last updated: 30 June 2026 · Applicable period: FY 2025-26 onwards
Written by the Tax Garden Compliance Team (Kondapur, Hyderabad). Reviewed by a Chartered Accountant on our practice team. References are to the CGST Act, 2017 and the GST portal. See Sources.
GST is full of form numbers and abbreviations. This glossary defines each term used in GST returns, grouped the way you meet them: registration and identifiers, the return forms, input and output tax terms, supply types, documents, and the compliance mechanisms like e-way bills and e-invoicing.
Looking for expert help with meaning of every term used in GST returns in India? The team at Tax Garden, based in Kondapur, Hyderabad, helps Indian SMEs stay compliant end-to-end: filings, notices, and advisory, all in one place.
Registration and Identifiers
| Term | Meaning | Example / where used | Common mistake |
|---|---|---|---|
| GSTIN | 15-character GST Identification Number, your GST identity | On every invoice and return | Quoting a cancelled/suspended GSTIN |
| GST | Goods and Services Tax, a destination-based indirect tax | Charged on supply of goods/services | Treating it as origin-based |
| CGST / SGST / IGST | Central, State, and Integrated GST components | Intra-state = CGST+SGST; inter-state = IGST | Wrong split on the invoice |
| HSN | Harmonized System of Nomenclature, a code for goods | Mandatory on invoices and GSTR-1 | Using the wrong HSN digits |
| SAC | Services Accounting Code, the HSN equivalent for services | On service invoices | Mixing up HSN and SAC |
| ARN | Application Reference Number | Generated on registration/refund filing | Losing the ARN for tracking |
| Place of Supply | The location that decides CGST/SGST vs IGST | On every transaction | Wrong place of supply, wrong tax |
| Composition Scheme | Simplified scheme: fixed % of turnover, no ITC | For small taxpayers (see CMP-08) | Crossing the turnover limit |
GST Return Forms
| Form | What it is | Who/when | Common mistake |
|---|---|---|---|
| GSTR-1 | Statement of outward supplies (sales) | Monthly or quarterly (QRMP) | Missing B2B invoices |
| GSTR-3B | Summary return with tax payment | Monthly or quarterly | Paying without ITC reconciliation |
| GSTR-2A | Dynamic auto-drafted purchase statement | Updates as suppliers file | Treating it as the ITC basis |
| GSTR-2B | Static auto-drafted ITC statement | Generated monthly, fixed | Claiming ITC not in 2B |
| GSTR-9 | Annual return | Yearly, above turnover threshold | Not reconciling with 3B/1 |
| GSTR-9C | Reconciliation statement (self-certified) | Yearly, above higher threshold | Skipping when required |
| CMP-08 | Quarterly statement-cum-challan | Composition taxpayers | Missing the quarterly payment |
| GSTR-4 | Annual return for composition | Yearly | Confusing with CMP-08 |
| GSTR-7 / GSTR-8 | TDS / TCS returns under GST | Deductors / e-commerce operators | Missing deductee details |
GSTR-2A vs GSTR-2B: 2A is dynamic and keeps changing as suppliers file. 2B is static, generated once a month, and is the basis for claiming ITC. Always reconcile purchases against 2B. See the ITC and GSTR-2B reconciliation guide.
Input, Output, and Tax Terms
| Term | Meaning | Why it matters | Common mistake |
|---|---|---|---|
| ITC (Input Tax Credit) | Credit for GST paid on purchases | Reduces output tax payable | Claiming ITC not reflected in 2B |
| Output Tax | GST charged on your sales | Paid via GSTR-3B | Under-reporting outward supply |
| RCM (Reverse Charge) | Recipient pays GST instead of supplier | Notified goods/services, unregistered purchases | Forgetting to self-invoice and pay |
| Tax Liability | Net GST payable (output minus ITC) | Settled in GSTR-3B | Ignoring interest on late payment |
| Electronic Cash Ledger | Tax deposited in cash on the portal | Pays liability not covered by ITC | Depositing under the wrong head |
| Electronic Credit Ledger | Balance of available ITC | Used to set off output tax | Using credit for the wrong tax type |
| Rule 86B | 1% cash payment restriction for large taxpayers | Limits full ITC set-off | Not paying the 1% in cash |
Supply Types
| Term | Meaning | GST treatment | Common mistake |
|---|---|---|---|
| Taxable Supply | Supply on which GST is charged | At the applicable rate | Wrong rate/HSN |
| Zero-Rated Supply | Exports and supplies to SEZ | 0% with ITC/refund (via LUT or with tax) | Confusing with exempt |
| Nil-Rated Supply | Goods/services at 0% rate | 0%, no refund of ITC | Treating as exempt |
| Exempt Supply | Notified exempt goods/services | No tax, no ITC | Claiming ITC on inputs |
| Non-GST Supply | Outside GST (e.g., petrol, alcohol) | No GST at all | Reporting under exempt |
| Composite Supply | Naturally bundled, one principal supply | Taxed at the principal item's rate | Splitting it artificially |
| Mixed Supply | Independent items sold together for one price | Taxed at the highest rate among them | Applying the lowest rate |
Zero-rated vs Nil-rated vs Exempt: zero-rated (exports/SEZ) lets you claim a refund of input tax; nil-rated and exempt supplies do not allow an ITC refund. Misclassifying exports as exempt forfeits your refund.
Documents
| Term | Meaning | When used | Common mistake |
|---|---|---|---|
| Tax Invoice | The primary GST document for a taxable supply | On every taxable sale | Missing mandatory fields |
| Bill of Supply | Invoice for exempt sales or composition dealers | When no GST is charged | Issuing a tax invoice instead |
| Debit Note | Issued when taxable value/tax increases | Upward price revision | Wrong linkage to original invoice |
| Credit Note | Issued when value/tax decreases (returns, discounts) | Sales returns, post-sale discount | Missing the time-limit to report |
| E-Way Bill | Document for movement of goods above a value threshold | Transport of goods | Expired or mismatched e-way bill |
| E-Invoice | Invoice reported to the IRP and assigned an IRN | Mandatory above turnover Rs 5 crore | Not generating IRN in time |
| IRN | Invoice Reference Number from the e-invoice portal | Unique ID for each e-invoice | Treating a non-IRN invoice as valid |
| QR Code | Code embedded in an e-invoice | Verification of the e-invoice | Missing QR on B2B invoices |
Compliance Mechanisms
| Term | Meaning | Note | Common mistake |
|---|---|---|---|
| QRMP | Quarterly Return, Monthly Payment scheme | For turnover up to Rs 5 crore | Missing monthly PMT-06 payment |
| PMT-06 | Monthly tax payment challan under QRMP | First two months of a quarter | Underpaying the fixed sum |
| LUT | Letter of Undertaking for exports without tax | Annual, for zero-rated supply | Not renewing the LUT each year |
| B2B | Business-to-business supply (registered buyer) | Invoice-level detail in GSTR-1 | Reporting B2B as B2C |
| B2C | Business-to-consumer supply (unregistered buyer) | Summary-level in GSTR-1 | Reporting large B2C as B2B |
| DRC-03 | Voluntary tax payment form | To pay shortfalls/interest | Wrong cause-of-payment selected |
| ASMT-10 | Scrutiny notice for return discrepancies | Department-issued | Ignoring the reply window |
Deep dives: e-way bill step-by-step, e-invoicing above Rs 5 crore, QRMP scheme, composition scheme, and ASMT-10 response.
The Seven Terms People Get Wrong
1. GSTR-2A vs GSTR-2B. 2A is dynamic; 2B is static and is the ITC basis. Reconcile against 2B.
2. Zero-rated vs Exempt. Zero-rated (exports/SEZ) allows an ITC refund; exempt does not. Exporting under the wrong label loses the refund.
3. Composite vs Mixed Supply. Composite = naturally bundled, taxed at the principal item's rate. Mixed = independent items for one price, taxed at the highest rate.
4. Nil-rated vs Exempt vs Non-GST. Nil-rated has a 0% rate; exempt is notified as exempt; non-GST (petrol, alcohol) is outside GST entirely.
5. ITC eligibility. ITC is allowed only if the invoice is in 2B, the supplier has paid, you have the goods/services, and you claim within the time limit.
6. GSTR-1 vs GSTR-3B. GSTR-1 reports sales invoice by invoice; GSTR-3B is the summary where tax is actually paid. Both must reconcile.
7. Debit Note vs Credit Note. A debit note raises value/tax; a credit note (returns/discounts) lowers it and has a reporting time-limit.
Need Help With GST Returns?
If GST terms and reconciliations are eating your time, hand them over. Tax Garden (4th Floor, CWS One, Kondapur, Hyderabad – 500084, Telangana) files GSTR-1 and GSTR-3B, reconciles ITC against GSTR-2B, manages e-invoicing and e-way bills, and files annual returns for businesses across Hyderabad and India. See our GST compliance services and pricing.
Looking for expert help with GST return filing and ITC reconciliation services in Hyderabad? The team at Tax Garden, based in Kondapur, Hyderabad, helps Indian SMEs stay compliant end-to-end: filings, notices, and advisory, all in one place.
Related Guides
- Input Tax Credit and GSTR-2B reconciliation
- E-way bill generation step-by-step
- E-invoicing above Rs 5 crore
- QRMP scheme guide
- GST composition scheme
- GST refund for exporters (LUT/RFD-01)
- Income tax return terms glossary
Frequently Asked Questions
What is GSTR-1?
GSTR-1 is the return that reports all outward supplies (sales), invoice by invoice for B2B and summarised for B2C. It is filed monthly, or quarterly under the QRMP scheme, and feeds the buyer's GSTR-2B.
What is GSTR-3B?
GSTR-3B is a summary return where you declare total outward supply, input tax credit, and net tax, and actually pay the GST. It must reconcile with GSTR-1 and GSTR-2B.
What is the difference between GSTR-2A and GSTR-2B?
GSTR-2A is a dynamic statement that keeps updating as suppliers file. GSTR-2B is a static statement generated once a month and is the basis for claiming input tax credit. Reconcile purchases against 2B.
What is Input Tax Credit (ITC)?
ITC is the credit for GST paid on business purchases, set off against GST on your sales. It can be claimed only if the invoice appears in your GSTR-2B, the supplier has paid, you have received the goods or services, and you claim within the time limit.
What is RCM (Reverse Charge Mechanism)?
Under RCM, the recipient pays GST instead of the supplier, for notified goods and services and certain purchases from unregistered suppliers. The recipient must self-invoice and pay the tax, then claim ITC if eligible.
What is the difference between HSN and SAC?
HSN (Harmonized System of Nomenclature) is the classification code for goods. SAC (Services Accounting Code) is the equivalent for services. Both must be quoted correctly on invoices and returns.
What is the difference between zero-rated and exempt supply?
Zero-rated supplies (exports and SEZ supplies) are taxed at 0% but allow a refund of input tax credit, either via an LUT or by paying tax and claiming a refund. Exempt supplies carry no tax and no ITC refund.
What is the difference between composite and mixed supply?
A composite supply is naturally bundled with one principal supply and is taxed at the principal item's rate. A mixed supply is independent items sold together for a single price and is taxed at the highest applicable rate.
What is an e-way bill?
An e-way bill is an electronic document required for the movement of goods above a notified value, generated on the e-way bill portal with details of the consignment, transporter, and vehicle.
What is an e-invoice and IRN?
An e-invoice is an invoice reported to the Invoice Registration Portal, which assigns a unique Invoice Reference Number (IRN) and a QR code. E-invoicing is mandatory for businesses above Rs 5 crore turnover.
What is the QRMP scheme?
QRMP (Quarterly Return, Monthly Payment) lets taxpayers with turnover up to Rs 5 crore file GSTR-1 and GSTR-3B quarterly while paying tax monthly through PMT-06 in the first two months of the quarter.
What is an LUT in GST?
An LUT (Letter of Undertaking) lets exporters make zero-rated supplies without paying IGST upfront. It is filed annually on the GST portal and must be renewed each financial year.
What is CMP-08?
CMP-08 is the quarterly statement-cum-challan through which composition-scheme taxpayers pay their tax. The annual return for composition dealers is GSTR-4.
What is GSTR-9 and GSTR-9C?
GSTR-9 is the annual GST return summarising the year's supplies, ITC, and tax. GSTR-9C is a reconciliation statement between the annual return and the audited accounts, required above a higher turnover threshold.
What is the difference between B2B and B2C supplies?
B2B supplies are made to registered businesses and are reported invoice by invoice in GSTR-1 so the buyer can claim ITC. B2C supplies are made to unregistered consumers and are reported in summary.
What is a debit note and a credit note in GST?
A debit note is issued when the taxable value or tax of an earlier invoice increases. A credit note is issued when it decreases, for example on sales returns or post-sale discounts, and must be reported within the time limit.
What is a Bill of Supply?
A Bill of Supply is issued instead of a tax invoice when no GST is charged, such as by composition dealers or for exempt supplies.
What is DRC-03?
DRC-03 is the form for making a voluntary GST payment, used to pay tax shortfalls, interest, or amounts demanded, with the correct cause of payment selected.
What is ASMT-10?
ASMT-10 is a scrutiny notice issued when the department finds discrepancies in your returns. You must respond within the time allowed, usually via ASMT-11. See our ASMT-10 response guide.
Where can I get GST return filing help in Hyderabad?
Tax Garden, based in Kondapur, Hyderabad, files GSTR-1 and GSTR-3B, reconciles ITC against GSTR-2B, and manages e-invoicing and annual returns for businesses across India. See our pricing page.
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Sources
Based on the CGST Act, 2017 and CGST Rules, the GST portal and its help documentation (gst.gov.in), CBIC notifications and circulars, and the e-invoice and e-way bill portals. Definitions are explained in plain English; confirm specific rates, thresholds, and dates against the official GST portal and CBIC notifications before filing.