GST Compliance Cycle: Registration, ITC, Returns, Appeals and Key Case Law

Summary: GST compliance operates as a connected cycle rather than a series of isolated filings. Registration establishes the taxpayer identity that flows into invoicing, outward-supply reporting, input tax credit, tax payment, annual returns and, where disputes arise, enforcement and appeals. The article examines this cycle under the CGST Act and Rules, including the simplified registration framework introduced from November 2025, invoice and GSTR-1 reporting requirements, GSTR-2B and the Invoice Management System, conditions governing input tax credit, Rule 37A reversals, GSTR-3B, the three-year bar on filing old returns, annual-return reconciliation and the functioning of the GST Appellate Tribunal. It discusses decisions including Bhandari Scrap Traders v. Union of India, Maruti Enterprise v. Union of India, Sahil Enterprises v. Union of India, State of Karnataka v. Ecom Gill Coffee Trading (P) Ltd., Aggarwal Dyeing and Printing Works v. State of Gujarat, Radha Krishan Industries v. State of Himachal Pradesh and Chief Commissioner of CGST v. Safari Retreats (P) Ltd.. The discussion also considers retrospective legislative amendments, supplier-default risks for recipients claiming ITC, portal-based compliance controls and remedies against coercive action. It concludes with a working compliance calendar and reform suggestions addressing supplier-payment visibility, interest on ITC reversals, statutory condonation, registration transparency, retrospective amendments and GSTAT procedure.

From Registration to Return Filing: Building a Compliant GST Cycle for Businesses

Part I: Introduction

Most GST disputes do not begin in a courtroom, or even in a notice. They begin much earlier, in ordinary places: a registration form filled in a hurry, an invoice booked a month late, a supplier who quietly stops filing his returns. By the time a show cause notice lands on the owner’s desk, the mistake is usually a year or two old and has already travelled through several returns.

That travelling quality is what sets GST apart from the taxes it replaced. A business does not really experience GST as a single levy; it experiences it as a cycle. It registers, raises invoices, reports them, pays, claims credit for the tax it has paid to others, reconciles, files an annual return and, when something goes wrong, defends itself. Each stage feeds the next. A wrong address on the registration becomes a wrong place of supply on the invoice, which becomes a wrong entry in GSTR-1, which turns up in a customer’s credit statement and may end up as that customer’s notice.

The subject deserves a fresh look in 2026 because the ground has moved quickly. A simplified three-day registration route came into force in November 2025. The three-year bar on filing old returns is now being enforced through the portal. The GST Appellate Tribunal, absent for almost eight years, began hearing appeals in February 2026. And on 24 July 2026 the Supreme Court settled, at least for now, one of the most argued questions in the Act: whether an honest buyer can lose input tax credit because his supplier never paid the tax over to the Government.

This blog follows the cycle in the order a business actually lives it. Part II sets out the statutory scheme, the principles courts keep returning to, and the developments that matter. Part III goes through each stage critically, with case law, and asks where the law is fair, where it is harsh, and what a careful business should do about it. Part IV closes with my own observations and a handful of reform suggestions. I have kept to the regular-taxpayer regime under the CGST Act (the State and UT Acts follow the same structure) and left out imports, refunds and e-way bill rules except where they touch the cycle. This is an academic discussion and not legal advice.

Part II: Legal Framework

A. How the statute is put together

GST is a dual levy. The Centre legislates through the CGST Act, 2017 and the IGST Act, 2017; each State and Union Territory has its own SGST or UTGST Act. The machinery is deliberately uniform. The CGST Rules, 2017 supply the forms and procedure, and CBIC notifications and circulars fill in the detail. Behind all of this sits the GST Council under Article 279A of the Constitution. Its recommendations drive most amendments, but the Supreme Court held in Union of India v. Mohit Minerals (P) Ltd., (2022) 10 SCC 700, that they are persuasive rather than binding on Parliament and the State legislatures. For a business, the takeaway is practical: the Act and the Rules have the last word, and a Council press release does not. The table below maps each stage of the cycle to its main legal source and to what the law asks of the taxpayer.

B. Four ideas that keep recurring in the case law

• Credit is a creature of the statute. Section 16 grants input tax credit only “subject to” its conditions, and courts have been slow to add anything the text does not give. In State of Karnataka v. Ecom Gill Coffee Trading (P) Ltd., (2023) 18 SCC 809, the Supreme Court placed on the dealer claiming credit the burden of proving the genuineness of the transaction, holding that invoices and cheque payments alone do not discharge it. The case arose under the Karnataka VAT Act, but it is routinely cited in GST disputes.
• Reasons and procedure matter. Cancellation, demand and attachment are all exercises of state power over a business, and High Courts have repeatedly quashed orders that do not say why. Aggarwal Dyeing and Printing Works v. State of Gujarat (Gujarat High Court, SCA No. 18860 of 2021, 24 February 2022) is the standard reference on cancellation.
• Coercive powers need tangible material. Radha Krishan Industries v. State of Himachal Pradesh, (2021) 6 SCC 771, decided on 20 April 2021, holds that provisional attachment under Section 83 must rest on the Commissioner’s recorded opinion, formed on tangible material, that the step is necessary to protect revenue.
• Parliament answers the courts. The legislature has shown that it will amend the Act, sometimes retrospectively, in response to judgments. The Finance (No. 2) Act, 2024 added Sections 16(5) and 16(6) with effect from 1 July 2017 to rescue old credit claims, while the Finance Act, 2025 reversed the practical effect of Safari Retreats on Section 17(5)(d). More on both in Part III.

C. Significant decisions at a glance

D. Recent legislative and policy developments

• Simplified registration. Rule 14A and Rule 9A were inserted by Notification No. 18/2025-Central Tax dated 31 October 2025, effective 1 November 2025.
• Credit time limits. Sections 16(5) and 16(6), inserted by the Finance (No. 2) Act, 2024 and brought into force by Notification No. 17/2024-Central Tax on 27 September 2024, operate from 1 July 2017. For invoices of FY 2017-18 to 2020-21, credit is available in any return under Section 39 filed up to 30 November 2021. Section 16(6) gives conditional relief where a cancelled registration is revoked.
• Three-year bar on returns. Introduced by the Finance Act, 2023 for returns under Sections 37, 39, 44 and 52, brought into force from 1 October 2023 by Notification No. 28/2023-Central Tax, and rolled out on the portal in stages through 2025 following GSTN advisories.
• GST Appellate Tribunal. The Principal Bench in New Delhi began hearing matters on 16 February 2026, with State benches following in phases. Filing is electronic and hearings are hybrid. A special window for backlog appeals under Section 112 was announced up to 30 June 2026 and reported to have been extended to 31 July 2026; anyone relying on it should confirm the position on the official GSTAT portal.
• Section 16(2)(c) settled. Bhandari Scrap Traders (24 July 2026), discussed below.

Part III: Critical Discussion

1. Registration: the front door people underestimate

Registration looks like paperwork, yet it fixes the identity on which every later document rests: the GSTIN, the principal place of business, the authorised signatory, the goods and services declared, the bank account. Mistakes here rarely announce themselves. They come back later as mismatched invoices, a suspended registration or an unannounced visit.

The law has recently made the door easier to walk through. Under Rule 14A, a small supplier can opt for registration within three working days of successful Aadhaar authentication, provided the output tax on its supplies to registered persons is not expected to exceed ₹2.5 lakh a month (central, State or UT, integrated and cess tax taken together). Rule 9A separately lets the portal approve low-risk applications on the strength of data analytics. A business that outgrows the limit has to withdraw from the scheme through FORM GST REG-32.

I welcome the speed, but two things bother me. First, the three-day promise depends on Aadhaar authentication and on a risk score the applicant never sees; someone routed to ordinary Rule 9 verification is not told why. Second, eligibility turns on the applicant’s own forecast of B2B liability. A growing business that underestimates its trajectory, or forgets REG-32, may later face questions about a declaration it made honestly. A simple portal alert as the threshold approaches would remove most of that risk.

The exit door is where the law is least forgiving. Section 29(2) lets the proper officer cancel registration from a date he considers fit, and that date can be retrospective. The consequences travel well beyond the registered person: customers may lose credit on invoices raised in the interim, and under Section 29(5) the person must pay back credit on stock and capital goods held on the date of cancellation. Courts have therefore insisted on discipline. In Aggarwal Dyeing and Printing Works, the Gujarat High Court quashed a cancellation that rested on a vague show cause notice and a cryptic order, holding in substance that reasons are what make a hearing real. Later decisions of the same court have had to remind officers of it, which says something about how slowly a principle travels from a judgment to an office.

2. From invoice to GSTR-1: the mirror problem

Once registered, the tax invoice becomes the basic unit of compliance. Section 31 prescribes what it must contain, Section 34 governs credit and debit notes, and Section 37 requires the details to be reported in GSTR-1 (or in the IFF for quarterly filers), by the 11th of the following month for a monthly filer.

What often gets missed is that GSTR-1 is not only the supplier’s return. Since Section 16(2)(aa) took effect on 1 October 2022, a recipient’s credit is tied to what the supplier has reported. A late or wrong GSTR-1 is therefore a problem for every customer that supplier has. The portal reflects this: the details flow into the customer’s GSTR-2B, and the Invoice Management System lets the customer accept, reject or hold each invoice before the credit is finalised.

The rule of thumb I would offer any business is this: an invoice is not finished when it is raised, it is finished when it appears correctly in the customer’s GSTR-2B. That means reconciling ledgers with e-invoice data before filing rather than after, treating credit notes as deadline-bound under Section 34, and keeping records for the retention period in Section 36.

3. Input tax credit: where compliance gets tested

If one issue defines GST compliance today, it is input tax credit. Section 16(2) lays down a chain of conditions. The recipient must hold a valid tax document and have received the goods or services; the supplier’s details must have been furnished and communicated to the recipient; the credit must not be restricted under Section 38; the recipient must have filed his return under Section 39; and, under clause (c), the tax charged must actually have been paid to the Government. Section 16(4) adds a time limit: credit cannot be taken after the earlier of 30 November following the financial year and the date the annual return is filed.

The Bhandari Scrap decision. Clause (c) had split the High Courts. The Delhi High Court had read down the similar provision of the Delhi VAT Act in On Quest Merchandising to protect purchasers who had done everything right, and the Supreme Court approved that approach in the VAT context in Arise India (2022). Taxpayers naturally argued for the same under GST, and the Gauhati High Court (National Plasto Moulding v. State of Assam) and the Tripura High Court (Sahil Enterprises, 6 January 2026) agreed to varying degrees. On the other side, the Kerala, Andhra Pradesh and Patna High Courts had applied the condition strictly, and the Gujarat High Court did the same in Maruti Enterprise (1 May 2026) after a detailed comparison of the VAT and GST schemes, expressly disagreeing with Tripura.

On 24 July 2026, in Bhandari Scrap Traders v. Union of India (SLP (C) No. 23931 of 2026), the Supreme Court dismissed the petitions and expressed complete agreement with Maruti Enterprise. Its central reasoning was that a GST recipient cannot be placed on the same footing as a bona fide dealer under the Delhi VAT law, because GST has its own machinery: a recipient who reverses credit can re-avail it once the supplier pays, under Section 41 read with Rule 37A, and the Revenue can pursue the supplier under Sections 73 and 74. Credit, in this reading, is a statutory concession and not a vested right. The Court also took note of the Gujarat High Court’s suggestion that the Government should build a technology-driven system for verifying supplier payments invoice by invoice.

Where I am not fully convinced. The reasoning is orthodox, but I find it uncomfortable at one point. The re-availment route is real on paper, yet its value depends on something the buyer cannot influence: whether the Revenue actually recovers the tax from a supplier who may have closed shop or disappeared. Interest at 18% keeps running on the reversed credit in the meantime. The buyer has paid GST as part of the price, cannot see the supplier’s GSTR-3B, and still carries the loss. The judgment places the burden of checking compliance on the party least able to check it.

In fairness to the Revenue, its difficulty is also real. If clause (c) applied only to collusive dealings, a dishonest chain would simply take care to look bona fide, and proving collusion afterwards is hard. Read with Ecom Gill, where the burden of proving genuineness was placed on the claimant, the message is that a buyer’s paper trail now has to show more than money leaving the bank account.

One more point on reading orders carefully. The Supreme Court’s order in Prime Metals v. CBIC (SLP (C) No. 18577 of 2026, 29 May 2026), which many took as a signal on this very issue, did not decide validity at all. It declined to interfere with a Rajasthan High Court order that had dismissed the writ petition because a statutory remedy was available, and it left the validity question open. That order should not be cited for more than it holds.

The legislature gives, and the legislature takes back. Credit rights also depend on Parliament’s mood. By inserting Sections 16(5) and 16(6) retrospectively from 1 July 2017, the Finance (No. 2) Act, 2024 rescued many demands raised under Section 16(4) for the early GST years, since credit taken in any return filed up to 30 November 2021 is now valid for FY 2017-18 to 2020-21. Yet in Safari Retreats (3 October 2024), where the Supreme Court read “plant or machinery” in Section 17(5)(d) as two separate expressions and applied a functionality test, opening a route to credit for buildings such as malls that are let out, the Finance Act, 2025 substituted “plant and machinery” with effect from 1 July 2017 and closed it again. The Government calls this the correction of a drafting error, and taxpayers see the retrospective reversal of a Supreme Court ruling. I do not think either description is wrong. The practical lesson is that a credit position built on a recent judicial interpretation should be booked with caution.

What a careful business can do, in the light of all this:

• Screen suppliers at onboarding (registration status, filing history) and re-check them at intervals, not once.
• Claim credit against GSTR-2B and act on the Invoice Management System instead of relying on purchase books alone.
• Watch the Rule 37A cut-off. Where a supplier has not filed GSTR-3B by 30 September following the financial year, reverse the credit by the return due for 30 November to avoid interest, and re-avail when the supplier pays.
• Write compliance into contracts: indemnity for tax defaults, and where commercially possible a right to hold back the tax component until the supplier has filed.
• Diary the Section 16(4) date for every financial year.

4. GSTR-3B and the three-year bar: discipline with a cliff edge

GSTR-3B is where money meets law. Tax is paid in cash or by utilising credit under Section 49; interest at 18% a year under Section 50 runs on late payment; and late fee under Section 47 accrues daily (₹50 a day, ₹20 for nil returns, subject to notified caps). Persistent default has consequences beyond money. The portal restricts GSTR-1 where earlier GSTR-3B returns are pending (Rule 59(6)) and blocks e-way bill generation for prolonged non-filing (Rule 138E). Non-filers also face a notice under Section 46 and, if they still do not file, assessment on best judgment under Section 62.

The newest layer is the three-year bar. The Finance Act, 2023 provided that returns under Sections 37, 39, 44 and 52 cannot be filed after three years from the due date. It was brought into force on 1 October 2023 (Notification No. 28/2023-Central Tax), and GSTN advisories through 2025 announced that the portal would enforce it in stages. For returns that fall on the wrong side of the line, the portal now offers an unbarring request that depends on approval by the proper officer. The policy is sound. No tax system can leave returns open forever, and businesses now have a hard outer date. But the bar is a cliff. As I read the scheme, a barred filing does not extinguish the tax that was due; it removes the taxpayer’s ability to file, self-assess and claim credit, while the liability itself can still be pursued through assessment. It also falls mechanically on the small taxpayer who stopped filing during a bad year. A discretionary, approval-based unbarring facility is an administrative patch and not a substitute for a statutory condonation provision with clear conditions. I have not come across an authoritative Supreme Court pronouncement on the bar, so its limits are still to be tested.

5. The annual return: a formality with a hidden clock

GSTR-9 and GSTR-9C are often treated as year-end housekeeping. Two things make them worth planning. First, Section 16(4) refers to the date the annual return is filed, so a business that files GSTR-9 early can close its own credit window before 30 November arrives. Second, the reconciliation between books, GSTR-3B and GSTR-2B is where mismatches become visible, and mismatches are a common starting point for scrutiny. The better habit is to reconcile quarterly and file the annual return only after the credit position for the year is truly final.

6. When it goes wrong: enforcement and remedies

Provisional attachment under Section 83 is the harshest tool available while an inquiry is pending. Radha Krishan Industries requires a recorded opinion, based on tangible material, that attachment is necessary to protect revenue, and it confirms that a writ petition is maintainable against such an order without first going through the appeal route. A business facing attachment should ask, before anything else, whether such a written opinion exists and what material it rests on. For demands, Sections 73 and 74 govern up to FY 2023-24, and Section 74A, inserted by the Finance Act, 2024, provides a single framework from FY 2024-25 onward. Appeals lie first to the Appellate Authority under Section 107 with a pre-deposit, and, now that the Tribunal is working, to the GSTAT under Section 112, again with a pre-deposit calculated on the balance disputed tax and subject to a cap. I expect one consequence of the Tribunal becoming functional. High Courts entertained many writ petitions in the past partly because the second appellate forum did not exist. With GSTAT now hearing matters, and the Supreme Court in Prime Metals having pointed a taxpayer to the statutory route, courts are likely to insist more firmly on alternative remedies. Businesses should build appeal deadlines and pre-deposit funding into their compliance calendar instead of planning to go straight to the High Court.

7. Putting it together: a working calendar

Part IV: Conclusion and Recommendations

Major findings

Compliance is a chain, not a set of separate filings. An error at registration or invoicing compounds through later returns and lands on other people’s credit. Entry is getting faster, and risk is moving to declarations and exits. Rule 14A speeds registration, but the taxpayer now carries the burden of forecasting turnover, withdrawing on time and answering cancellation notices properly. Credit is now firmly compliance-based. After Bhandari Scrap Traders, a supplier’s failure to pay the tax is the buyer’s risk, softened only by reversal and re-availment. Return discipline is time-bound and automated. Late fee, interest, portal blocks and the three-year bar leave little room for correcting course later. Remedies are stronger, but the queue has changed. With GSTAT functioning, courts are likely to expect statutory routes to be used first.

My observations

Reading these decisions and amendments side by side, I was struck by how often the law asks the taxpayer to do something the system does not let him see. A buyer must ensure the supplier has paid, but cannot view the supplier’s payment. A taxpayer must file within three years, but has no statutory way back if he misses it. A small business must judge its own risk category for Rule 14A, but does not see the portal’s. The compliance burden is legitimate in principle. It is the information gap around it that makes it feel unfair. I also think it is fair to say that the recent Supreme Court decision is orthodox law but not the end of the policy debate. The Court itself, in agreeing with the Gujarat High Court, acknowledged that honest purchasers face difficulties and that the Government should look at technology-driven verification. That invitation should not be left unanswered.

Suggested reforms

Show supplier payment status to the buyer. GSTR-2B could carry an invoice-level indicator that the supplier has filed GSTR-3B and discharged tax for that period, so that the buyer can act before claiming credit. Ease the interest burden on bona fide buyers. Where a recipient reverses credit under Rule 37A because of a supplier’s default, and has paid the tax to the supplier through banking channels, interest could be recovered from the defaulting supplier or deferred until the Revenue has had a reasonable time to recover. Replace discretionary unbarring with statutory condonation. A defined window, a graded late fee and clear conditions would be fairer and more predictable than approval by the proper officer. Make Rule 14A more transparent. Alert taxpayers as they approach the threshold, publish the general criteria used for Rule 9A routing, and give a reason when an application moves off the fast track. Use retrospective amendment sparingly. Where Parliament overrides a judgment, prospective effect should be the default, and retrospective effect should come with stated reasons and transition protection. Support GSTAT with clear practice directions. Uniform procedure, complete bench coverage and unambiguous guidance on pre-deposit would make the new forum more useful in practice. A compliant GST cycle is not built through one careful filing. It is built by treating registration, invoicing, credit, returns and disputes as connected stages, and by keeping a paper trail that would survive an officer’s questions two years later. The law is demanding, and after 2026 it is also clearer than it has been. Businesses that plan around the cycle, and not around the due date, will be the ones that spend less time in front of the Tribunal.

Authorities and Sources

Statutes and rules

• Central Goods and Services Tax Act, 2017 (Sections 16, 17(5), 22-25, 29-31, 34, 36-39, 41, 44, 46-47, 49-50, 62, 73-74A, 83, 107-108, 112); Integrated Goods and Services Tax Act, 2017; State GST and UTGST Acts.
• Central Goods and Services Tax Rules, 2017 (Rules 8-10B, 9A, 14A, 37A, 48, 59, 61, 138E).
• Finance Act, 2023; Finance (No. 2) Act, 2024; Finance Act, 2025.

Notifications and official material

• CBIC Notification No. 28/2023-Central Tax (31 July 2023); No. 17/2024-Central Tax (27 September 2024); No. 18/2025-Central Tax (31 October 2025).
• GSTN advisories on barring of returns after three years (2024-2025); GSTN advisory on Rule 14A (1 November 2025); GSTAT portal and public notices (2026); GST Council recommendations.

Cases

• Bhandari Scrap Traders v. Union of India, SLP (C) No. 23931 of 2026 (SC, 24 July 2026).
• Maruti Enterprise v. Union of India, SCA No. 18080 of 2023 and allied matters (Guj HC, 1 May 2026).
• Sahil Enterprises v. Union of India, W.P.(C) No. 688 of 2022, (2026) 154 GSTR 108 (Tri) (6 January 2026).
• Prime Metals v. CBIC, SLP (C) No. 18577 of 2026 (SC, 29 May 2026).
• Chief Commissioner of CGST v. Safari Retreats (P) Ltd., Civil Appeal No. 2948 of 2023, 2024 INSC 756 (SC, 3 October 2024).
• State of Karnataka v. Ecom Gill Coffee Trading (P) Ltd., (2023) 18 SCC 809.
• Aggarwal Dyeing and Printing Works v. State of Gujarat, SCA No. 18860 of 2021 (Guj HC, 24 February 2022).
• Union of India v. Mohit Minerals (P) Ltd., (2022) 10 SCC 700.
• Radha Krishan Industries v. State of Himachal Pradesh, (2021) 6 SCC 771 (SC, 20 April 2021).
• On Quest Merchandising India (P) Ltd. v. Government of NCT of Delhi, (2017) 87 taxmann.com 179 (Del); Commissioner of Trade and Taxes, Delhi v. Arise India Ltd., 2022 (60) GSTL 215 (SC); National Plasto Moulding v. State of Assam (Gauhati HC).

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Disclaimer: This blog is written for academic discussion and reflects the law as available on 24 September 2026. It is not legal or tax advice. Readers should check provisions, notifications and judgments against official sources before relying on them.

By Vishwajeet | B.A. LL.B. (Hons.), School of Law, Lovely Professional University Law stated as on 24 September 2026 • Approx. 16 minute read