Form GST RET-1 was the proposed simplified monthly return designed to replace the current GSTR-1 and GSTR-3B filing system with a single, unified return supported by two annexures: GST ANX-1 (for outward supplies) and GST ANX-2 (for inward supplies). The GST Council approved this new return framework to address compliance challenges faced by taxpayers, but the system has not been fully implemented. The current GSTR-1 and GSTR-3B filing structure continues to be in use as of FY 2025-26.
Background: Why Was GST RET-1 Proposed?
When GST was launched in July 2017, the original return filing system was designed with three monthly returns: GSTR-1 (outward supplies), GSTR-2 (inward supplies), and GSTR-3 (monthly return). This system proved too complex for widespread adoption. GSTR-2 and GSTR-3 were suspended shortly after launch, and GSTR-3B was introduced as a simplified interim measure.
The GST Council then constituted a committee to design a simplified return system. The Form GST RET-1 was the result, approved in principle by the Council at its 31st meeting (December 2018). The system aimed to combine the functions of GSTR-1, GSTR-2, and GSTR-3B into a single return, with a real-time invoice-matching mechanism.
Original vs. Proposed vs. Current Return System
| System | Returns | Status | Key Feature |
| Original (July 2017) | GSTR-1, GSTR-2, GSTR-3 | Suspended (GSTR-2 and GSTR-3 never operationalised) | Three separate monthly returns |
| Interim (current) | GSTR-1 + GSTR-3B | Active since July 2017 | Summary return (3B) + invoice return (1) |
| Proposed simplified | GST RET-1 + ANX-1 + ANX-2 | Piloted but not implemented | Single return with real-time invoice matching |
| Enhanced current | GSTR-1 + GSTR-3B + IMS + GSTR-2B | Active from October 2024 | IMS provides accept/reject functionality similar to ANX-2 |
Structure of Form GST RET-1
GST RET-1 was designed as a comprehensive monthly return containing summary data auto-populated from the two annexures.
GST ANX-1 (Outward Supply Annexure)
ANX-1 would capture all outward supply details currently reported in GSTR-1. Suppliers would upload invoices in real time (continuously throughout the month) rather than in a single batch filing. The annexure covered B2B supplies (with recipient GSTIN), B2C supplies (inter-state above Rs. 2.5 lakh), exports and supplies to SEZ, amendments to previously reported invoices, and credit and debit notes.
Real-time upload meant that as soon as a supplier issued an invoice, it could be uploaded to ANX-1 and would immediately appear in the recipient’s ANX-2 for verification. This was a significant improvement over the batch-mode filing of GSTR-1.
GST ANX-2 (Inward Supply Annexure)
ANX-2 was the most innovative feature of the proposed system. It would auto-populate with invoices uploaded by suppliers in their ANX-1 filings. The recipient could then take one of three actions on each invoice:
| Action | Meaning | ITC Impact |
| Accept | The invoice is correct and valid | ITC is included in the return |
| Reject | The invoice is incorrect or not related to the recipient | ITC excluded; supplier notified |
| Pending | The invoice needs further verification | ITC deferred to the next period |
This accept/reject mechanism was designed to resolve ITC mismatches at the source, before they flowed into the return computation. Invoices that were neither accepted nor rejected by the recipient would be deemed accepted after a specified period.
GST RET-1 (Main Return)
The main return would auto-populate from ANX-1 and ANX-2 data, summarising total outward supplies and output tax liability, total Input Tax Credit available (from accepted invoices), ITC reversed, net tax payable, and payment details.
The taxpayer would only need to verify the auto-populated data, make any adjustments, and submit the return. This single-step process was intended to reduce the compliance burden compared to filing GSTR-1 and GSTR-3B separately.
Current Status: Why GST RET-1 Was Not Implemented
The simplified return system was piloted in a limited rollout but faced several implementation challenges. The technology infrastructure required to support real-time invoice uploads across millions of taxpayers proved complex. Small taxpayers with limited digital capability struggled with the continuous upload requirement. The transition from the existing GSTR-1/GSTR-3B system required extensive taxpayer education and upgrades to the portal.
Instead of a full migration to GST RET-1, the government chose to incrementally enhance the existing system. The key features of the proposed simplified return have been incorporated through GSTR-2B (auto-generated ITC statement from supplier filings, replacing the need for ANX-2 as a separate filing), the Invoice Management System (IMS) launched in October 2024 (providing the accept/reject/pending functionality originally designed for ANX-2), auto-population of GSTR-3B from GSTR-1 and GSTR-2B data, and GSTR-1A reintroduction (allowing amendments before GSTR-3B filing).
Comparison: Proposed RET-1 vs Current Enhanced System
| Feature | Proposed GST RET-1 | Current System (2025) |
| Outward supply reporting | ANX-1 (real-time upload) | GSTR-1 (batch filing by 11th/13th) |
| Inward supply verification | ANX-2 (accept/reject/pending) | IMS dashboard (accept/reject/pending) |
| ITC statement | Auto from ANX-2 actions | GSTR-2B (auto-generated from supplier GSTR-1) |
| Summary return | GST RET-1 (single return) | GSTR-3B (separate from GSTR-1) |
| Amendment mechanism | Within ANX-1 | GSTR-1A (reintroduced July 2024) |
| Number of filings per month | 1 (RET-1) | 2 (GSTR-1 + GSTR-3B) |
| Filing approach | Continuous (real-time) | Batch (periodic) |
The current enhanced system effectively delivers most of the benefits originally planned for GST RET-1, albeit through multiple returns rather than a single unified return. The IMS provides the accept/reject functionality, GSTR-2B provides the auto-generated ITC statement, and GSTR-1A provides the pre-3B amendment capability.
Relevance for Current Taxpayers
While GST RET-1 itself is not in use, understanding its design helps taxpayers appreciate the rationale behind current system enhancements. The IMS, in particular, directly implements the ANX-2 concept. Taxpayers who actively use IMS to verify supplier invoices are effectively performing the same function that ANX-2 was designed to serve.
The GST Council may revisit the simplified return concept in the future, potentially consolidating GSTR-1 and GSTR-3B into a single filing. Any such change would likely leverage the existing IMS and GSTR-2B infrastructure rather than introducing an entirely new system.
Key Terms
• GST RET-1: The proposed simplified single monthly return, designed to replace GSTR-1 and GSTR-3B, was approved by the GST Council but not fully implemented
• GST ANX-1: The outward supply annexure for real-time invoice upload, equivalent to GSTR-1 in the proposed system
• GST ANX-2: The inward supply annexure with accept/reject/pending functionality for recipients, now implemented through the Invoice Management System
• Invoice Management System (IMS): The GST portal dashboard launched in October 2024, which provides the accept/reject functionality originally designed for ANX-2
• GSTR-2B: The auto-generated monthly ITC statement based on supplier GSTR-1 filings, serving the same purpose as the proposed ANX-2 auto-population
Understanding Your GST Return Obligations?
Stay current with the active return filing system and use IMS effectively for ITC verification. Use WFYI tools to manage your GSTR-1, GSTR-3B, and IMS compliance.
| Disclaimer: This article is for informational purposes only and does not constitute legal or tax advice. Consult a qualified tax professional for advice specific to your situation. |
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Frequently Asked Questions
Q1: Is Form GST RET-1 currently in use?
No. GST RET-1 was proposed and piloted, but not fully implemented. The current filing system continues with GSTR-1 (outward supplies) and GSTR-3B (summary return) as separate monthly or quarterly returns.
Q2: What happened to the features planned for GST RET-1?
The key features have been incorporated into the existing system. The accept/reject mechanism from ANX-2 is now available through the Invoice Management System (IMS). The auto-generated ITC statement is provided through GSTR-2B. Pre-filing amendments are handled through GSTR-1A.
Q3: Will GST RET-1 be implemented in the future?
The GST Council has not announced a timeline for implementing GST RET-1. The focus has shifted to enhancing the existing GSTR-1/GSTR-3B system with IMS, GSTR-2B auto-population, and GSTR-1A amendments.
Q4: How is the current IMS similar to the proposed ANX-2?
Both allow recipients to accept, reject, or keep pending supplier invoices before they flow into ITC computation. The IMS serves as a dashboard on the GST portal, mirroring ANX-2’s core functionality.
Q5: Do taxpayers need to prepare for a migration to GST RET-1?
No. There is no current migration plan. Taxpayers should focus on compliance with the active system: filing GSTR-1 and GSTR-3B on time and using IMS for invoice verification from October 2024 onwards.
