Dual Control Without Coordination: How CGST–SGST Jurisdiction Gaps Are Trapping Taxpayers in Parallel Proceedings
Overview
One of the most troubling administrative failures in the GST regime is not found in the charging provision, the rate notifications, or even in the return architecture. It is found in the everyday working of jurisdiction. On paper, GST is a dual levy administered through a framework of cross-empowerment, intended to avoid duplication and to create a coordinated tax system. In actual practice, however, many taxpayers face the exact opposite experience: one show cause notice from CGST, another from SGST, sometimes a third from a different wing in the same department, all touching the same financial year and, in many cases, the same transactions.
This is not an occasional inconvenience. It has become a recurring administrative pattern. CGST may issue a notice for a year, adjudicate it, and pass an order. After two or three years, SGST may issue another notice for the same financial year. In the same city, audit officers, anti-evasion officers, and jurisdictional adjudicating officers may all proceed independently against the same GSTIN with little or no visible internal mapping. Taxpayers and professionals are then forced to spend time writing letters under Section 6(2)(b), attaching copies of earlier notices and orders, and reminding the department that duplicate proceedings are barred by law. Very often the answer from the field is blunt: file an objection, or file an appeal; the office cannot help because there is no internal system to stop the duplication.
This article examines the legal rule contained in Section 6(2)(b), the way courts have interpreted it, the administrative reasons why duplicate notices continue despite a clear statutory bar, and the practical steps taxpayers and professionals can take when caught in overlapping proceedings. The issue matters not only for litigation strategy but also for a wider public understanding of how GST administration is actually working on the ground.
The legal framework: what Section 6(2)(b) was meant to achieve
Section 6 of the CGST Act deals with authorisation of officers of State tax and Union Territory tax as proper officers in certain circumstances. The critical protection for taxpayers lies in Section 6(2)(b), which states, in substance, that where a proper officer under the SGST Act or the UTGST Act has initiated any proceedings on a subject matter, no proceedings shall be initiated by the proper officer under the CGST Act on the same subject matter. The same logic runs in the opposite direction through the equivalent State enactments.
The purpose is obvious. GST is a dual levy, but the taxpayer is one. The transaction is one. The period is one. The law therefore does not envisage that both Central and State authorities should independently adjudicate the same dispute on the same facts and same subject matter merely because each has statutory power under its own enactment. Section 6(2)(b) is, therefore, a statutory anti-duplication provision. It exists to prevent harassment, inconsistent findings, overlapping demands, and multiple rounds of defence on the same factual matrix.
The courts have increasingly treated this as a “single proceeding rule” rather than a mere administrative guideline. Once one competent authority has validly initiated proceedings on a particular subject matter, the other authority is expected to stand down, unless the later proceeding is on a truly different subject matter. This is the heart of the provision and the reason why it has become such an important defence in practice.
Why duplicate proceedings continue despite a clear statutory bar
The frustrating reality is that Section 6(2)(b) exists in the statute book, but internal administrative behaviour often proceeds as if the provision were an optional caution rather than a binding restraint. Several structural reasons appear to explain this.
No robust internal mapping of proceedings
The first and most visible problem is the absence of a comprehensive and reliable case-mapping system at the GSTIN-year-issue level. There is still no universally visible back-end control that tells the officer, before issue of a DRC-01 or other adjudicatory notice, that proceedings have already been initiated or completed by another GST authority for the same subject matter and period. In the absence of such mapping, each officer often acts only on the information available within the officer’s own formation or wing.
Departmental silos within and across administrations
The second problem is silo functioning. CGST and SGST often operate as separate universes. Even within the same administration, audit, anti-evasion, intelligence, adjudication, and jurisdictional assessment formations do not always communicate effectively with one another. The result is predictable: multiple officers touch the same set of transactions through different entry points, and the taxpayer becomes the only party forced to maintain the complete picture.
Different institutional incentives
Another practical reason is that Central and State formations have separate reporting lines, internal targets, and performance pressures. A case already pursued by one authority may not be treated as an administrative reason for the other authority to refrain from issuing its own notice. The safer field-level approach, from the standpoint of internal accountability, often becomes: issue first, let the taxpayer object later.
Portal strength for taxpayers, weakness for administrative coordination
The GST portal is reasonably strong in return filing, tax payment, and document visibility from the taxpayer’s side. It is much weaker, at least from the outside, in showing whether the same period and subject matter are already under audit, investigation, or adjudication by another authority. That asymmetry is one reason why professionals now maintain their own “proceedings map” for each client, because the system itself does not reliably do so for them.
What the courts are saying: a clear trend against parallel proceedings
Judicial thinking has moved steadily in favour of taxpayers on this issue, though with some important nuance. The broad principle emerging from recent High Court and Supreme Court developments is that parallel proceedings on the same subject matter are impermissible, but the phrase “same subject matter” must be applied carefully and factually.
Gauhati High Court: one proceeding bars another
The Gauhati High Court in a 2024 matter held that once a proceeding is initiated under either the CGST Act or the SGST Act, another proceeding under the other Act for the same period and subject matter cannot be initiated. The Court treated Section 6(2) as a real bar and suspended the operation of the overlapping order. This is an important practical precedent because it recognizes the administrative mischief for what it is: not harmless duplication, but a legal defect in the second proceeding itself.
Telangana High Court: Dott Services and the anti-duplication principle
The Telangana High Court in Dott Services Ltd. v. State of Telangana treated Section 6 as a protection against repeat proceedings on the same facts once they had already been finalized by one authority. The Court noted that when proceedings on the same facts have been taken to their conclusion by one GST authority, another authority cannot reopen the same matter in a separate adjudicatory track. This is particularly significant for taxpayers who receive a fresh SGST notice years after a CGST order, or vice versa.
Orissa High Court: audit by one side bars demand on the same subject matter by the other
The Orissa High Court has also been noted in recent professional summaries as having quashed or set aside Central GST proceedings where State GST had already conducted audit and moved on the same subject matter. The underlying reasoning is that the GST structure is designed to avoid overlapping proceedings and that one completed or initiated proceeding on the same issue cannot be mirrored by a second authority under Section 74 merely because it belongs to the other tax administration.
Supreme Court trend: Section 6(2)(b) is a real statutory restraint
Recent summaries of Supreme Court developments point to a stronger conceptual clarity on Section 6(2)(b). The Supreme Court has stated that parallel proceedings cannot be initiated by one tax administration if another has already commenced proceedings on the same subject matter, and that a two-fold test should be applied: whether the earlier and later proceedings are based on identical facts and whether they seek to assess or recover the same tax liability, deficiency, or obligation. This is an important development because it pushes the discussion beyond general inconvenience and grounds it in a precise legal test.
The Court also appears to recognise a distinction between assignment-based administrative functions and intelligence-based enforcement action. Audit of accounts or detailed scrutiny of returns is expected to be handled by the assigned administration, while intelligence-based action may initially be taken by either side. But once adjudicatory proceedings overlap on the same liability or contravention, Section 6(2)(b) is triggered. For practitioners, this distinction is crucial: not every inquiry or summons bars later action, but once the subject matter matures into overlapping adjudication, the statutory bar becomes real.
The critical nuance: same period is not enough; same subject matter matters
One important caution must be noted. The law does not automatically prohibit every second notice merely because it relates to the same financial year. The real question is whether both proceedings concern the same subject matter.
That means a notice on ITC from certain named suppliers and a separate notice on suppression of outward turnover may, in law, coexist if they rest on different facts, different contraventions, and different tax liabilities. On the other hand, if both notices target the same invoices, same suppliers, same alleged contravention, or overlapping tax exposure for the same period, Section 6(2)(b) is immediately attracted.
This nuance explains why some officers try to defend duplicate proceedings by saying that the issues are “different.” Sometimes that is true. Often it is only partly true. Professionals must therefore compare the two notices line by line: period, transaction base, suppliers involved, statutory provision invoked, nature of contravention alleged, and quantum of proposed demand. Only then can the correct Section 6(2)(b) objection be framed.
Summons, inquiries, and SCNs: when does the bar begin?
Another recurring issue is whether a summons under Section 70 or a preliminary inquiry itself amounts to “initiation of proceedings” for purposes of Section 6(2)(b). Professional commentary on recent case law suggests that a mere summons or inquiry does not, by itself, amount to initiation of adjudicatory proceedings. The courts have distinguished between an investigative step and the formal commencement of proceedings through a statutory notice on the subject matter.
This distinction matters. If one wing has only issued summons and the other later issues a proper show cause notice, the case for invoking Section 6(2)(b) may be weaker unless the earlier process had already matured into a legally cognizable proceeding on the same issue. But once a proper notice under Section 73 or 74 is issued and the subject matter is clearly seized by one authority, the other authority should not enter the same field with a second adjudicatory track.
How this problem affects taxpayers and professionals on the ground
For the taxpayer, duplicate proceedings are not a mere technical irritation. They create real cost, uncertainty, and legal risk.
First, they multiply compliance burden. Replies have to be filed twice, hearings attended twice, records collated twice, and professional time spent repeatedly on jurisdictional objections instead of the merits.
Second, they create the possibility of inconsistent findings. One authority may accept part of the explanation while another rejects it. One may drop proceedings while the other confirms the demand. This inconsistency is not just inconvenient; it weakens credibility in the administration itself.
Third, they create the danger of overlapping recovery. Even if final double recovery is not actually made, the existence of multiple adjudication orders for the same issue puts the taxpayer under severe pressure and may require appeals or writ petitions simply to restore basic procedural sanity.
Fourth, they transfer the department’s internal coordination burden onto the taxpayer. Instead of the system identifying overlap on its own, the taxpayer must draft representations, attach prior SCNs and orders, plead Section 6(2)(b), and educate the second officer on the illegality of duplication.
What taxpayers and professionals should do immediately when a second notice arrives
Until the department creates a real mapping system, taxpayers and practitioners have to defend themselves with disciplined documentation and timely objections.
Raise Section 6(2)(b) at the earliest stage
The objection should be raised immediately on receipt of the second SCN. The reply should state the date, reference number, issuing authority, statutory provision, financial year, and subject matter of the earlier notice or order, and it should attach copies of those proceedings. A generic statement that “parallel proceedings are not permitted” is not enough. Precision is critical.
Demonstrate overlap factually, not rhetorically
The best reply usually contains a short comparative chart showing: period involved, suppliers or invoices involved, contravention alleged, section invoked, and quantum involved in both proceedings. If overlap is visible on paper, the Section 6(2)(b) objection becomes far stronger.
Ask the second officer to clarify whether the subject matter is distinct
If the second notice is vague, the taxpayer should require the officer to clarify whether the issues are separate from the earlier proceedings. If the department claims distinction, it should be called upon to state the distinction clearly. This is important because many later writ petitions turn on whether the duplication was actual or only assumed.
Seek abeyance, withdrawal, or consolidation
Depending on the stage of the case, the taxpayer may ask for the second proceedings to be dropped, kept in abeyance, or consolidated before one authority so that overlapping adjudication is avoided. Even if the officer refuses, such a request helps build a strong record showing that the taxpayer consistently objected to duplication and did not acquiesce.
Maintain an internal proceedings map for each GSTIN
Every professional office should maintain a one-page annual “jurisdiction map” for each GSTIN showing all notices, audits, summons, SCNs, DRC-01s, DRC-07s, and appellate developments by year and by authority. In present GST practice, this self-created map is often more reliable than the administration’s own coordination system.
What the department should do to reduce the problem
The solution to this problem is not conceptually difficult. It is mainly a question of administrative design and discipline.
Create GSTIN-year-issue level digital mapping
The back-end system should not permit issuance of a fresh adjudicatory notice on the same GSTIN, period, and issue code unless the officer records why Section 6(2)(b) does not apply and obtains supervisory approval. A digital lock or warning system would prevent a large volume of duplicate proceedings before they begin.
Make cross-reference mandatory in every SCN
Every SCN for a prior year should require a declaration from the issuing officer on whether any earlier proceedings exist for that year and, if yes, why the present subject matter is distinct. This single discipline would substantially reduce casual duplication.
Issue joint guidance from Centre and States
CBIC and State GST administrations should issue a joint administrative instruction clarifying the handling of overlapping proceedings, the meaning of “same subject matter,” and the responsibility of the first authority to take the case to its logical conclusion.
Adopt a lead-jurisdiction model for major taxpayers
For large or medium taxpayers facing recurring audit and enforcement exposure, a lead-jurisdiction model could be used for a fixed cycle so that one administration coordinates the proceeding while the other shares intelligence rather than issuing parallel adjudicatory notices. Such an approach would better reflect the promise of coordinated GST administration.
Conclusion
The recurring problem of duplicate notices by CGST and SGST is not merely a drafting defect or a small procedural inconvenience. It reveals a deeper weakness in GST administration: dual control without real coordination. Section 6(2)(b) was enacted precisely to prevent this. High Courts and recent Supreme Court developments have increasingly reaffirmed that once one authority has initiated proceedings on the same subject matter, the other cannot run a parallel adjudicatory process on the same liability, same contravention, and same factual base.
Yet the ground reality remains difficult. In the absence of proper internal mapping, the taxpayer and the professional continue to perform the coordination work that the administration itself should have done. Letters under Section 6(2)(b), annexures of prior notices, comparison charts of subject matter, and repeated jurisdiction objections have become a routine part of practice. That is not how a modern, technology-driven indirect tax system was meant to operate.
Until the system improves, the practical way forward is clear. Taxpayers must preserve a full proceedings history, raise jurisdictional objections at the earliest stage, demonstrate overlap precisely, and take parallel proceedings seriously as a legal infirmity, not merely as an administrative annoyance. For the department, the long-term answer lies in mapping, coordination, and internal accountability. Without that, the promise of “one nation, one tax” will continue to be undermined by a field reality better described as “one taxpayer, many proceedings.”
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