GST Registration in Pallavaram-Thiruvallur High Road, Chennai

Section 22 of the Central Goods and Services Tax Act 2017 sets the threshold-based registration trigger. A person whose aggregate turnover in a financial year exceeds ₹40 lakh for exclusive goods suppliers in Tamil Nadu or ₹20 lakh for service or mixed suppliers is liable to be registered in every State from which they make taxable supplies. Aggregate turnover is computed PAN-wise across India and includes taxable, exempt, exports and inter-State supplies but excludes inward supplies on reverse charge.

Section 24 overrides the threshold under Section 22 and mandates registration regardless of turnover for inter-State taxable suppliers, casual taxable persons, persons liable under reverse charge, e-commerce operators and sellers on e-commerce platforms required to collect TCS under Section 52, non-resident taxable persons, TDS deductors under Section 51, Input Service Distributors and persons supplying through e-commerce operators.

Section 25 lays out the procedural framework — every person liable under Section 22 or Section 24 must apply for registration within thirty days from the date of becoming liable, in every State from which they make a taxable supply. Voluntary registration is permitted under Section 25(3). The proper officer grants registration after verification under Rule 9. Multiple business verticals within the same State can opt for separate registrations under Section 25(2) read with Rule 11.

Rule 8 of the CGST Rules prescribes Form GST REG-01 as the application for registration. Part A captures PAN, mobile and email — the system validates these and generates a Temporary Reference Number (TRN). Part B captures business details, promoters, authorised signatory, principal place of business, additional places, goods and services with HSN/SAC codes, bank account details and verification.

Rule 9 requires the proper officer to examine the REG-01 application within seven working days. If everything is in order the registration is granted and the GSTIN issued in Form REG-06. If any information is found deficient, a notice in Form REG-03 is issued and the applicant must reply in REG-04 within seven working days. If no reply is received or the reply is unsatisfactory, the application is rejected in Form REG-05.

The Rule 8(4A) framework requires the promoter or authorised signatory to undergo Aadhaar authentication. If Aadhaar authentication is not opted for, physical verification of the business premises under Rule 25 is mandatory before registration is granted. Aadhaar authentication is the faster path for most applicants.

What is GST registration and when is it required

Statutory basis under Section 22

GST registration in India is governed by Sections 22 to 30 of the Central Goods and Services Tax Act 2017 read with corresponding State GST legislation. The trigger for compulsory registration under Section 22 is an aggregate annual turnover of ₹40 lakh for exclusive suppliers of goods in Tamil Nadu (per Notification 10/2019-Central Tax) and ₹20 lakh for service or mixed suppliers. Aggregate turnover under Section 2(6) is the sum of all taxable supplies, exempt supplies, exports of goods and services, and inter-State supplies of a person having the same Permanent Account Number, computed on an all-India basis. Once a person crosses this threshold in any financial year, the obligation to register arises within thirty days under Section 25(1). Section 24 of the CGST Act overrides Section 22 entirely for specified categories including inter-State taxable suppliers, casual taxable persons, persons supplying through e-commerce operators, and reverse-charge liable persons — these categories must register regardless of turnover.

Voluntary registration option

A person whose aggregate turnover is below the threshold can still register voluntarily under Section 25(3) of the CGST Act. Once voluntary registration is granted, all provisions of GST law apply to such a person as they would to any registered person — including monthly returns, ITC eligibility for inputs, and the obligation to issue tax invoices. Voluntary registration is commonly chosen by B2B service providers and traders who want to enable ITC pass-through to their corporate clients, by exporters who need to file LUTs and claim refunds, and by startups that want to capture ITC on early-stage procurement before revenue commencement. Once obtained, voluntary registration cannot be casually surrendered — REG-16 cancellation follows the same procedure as any other cancellation under Section 29.

Cancellation and revocation pathway

Voluntary cancellation under Section 29(1)

Section 29(1) of the CGST Act and Rule 20 of the CGST Rules permit voluntary cancellation of GST registration in five scenarios: discontinuance of business, transfer of business including amalgamation or demerger, change in constitution of business resulting in a new PAN, taxable supply ceasing to be in the regime, or aggregate turnover falling below the threshold (other than Section 24 categories). The application is filed in Form REG-16 within 30 days of the event triggering cancellation. The proper officer examines the application and either grants cancellation in REG-19 or seeks information in REG-17. After cancellation, the final return GSTR-10 must be filed within three months of the cancellation order or the effective date of cancellation, whichever is later. GSTR-10 captures stock-in-hand and tax thereon as of the cancellation date.

Suo motu cancellation and revocation

Section 29(2) of the CGST Act empowers the proper officer to cancel registration suo motu in seven scenarios — including non-filing of returns for six consecutive months (three quarters for composition), violation of provisions of the Act or Rules, fraudulent registration, and material discrepancy in the registration data. Before suo motu cancellation, the officer issues a show-cause notice in REG-17, to which the taxpayer must reply in REG-18 within seven working days. If the reply is unsatisfactory or no reply is filed, the cancellation order issues in REG-19. The taxpayer can apply for revocation of suo motu cancellation in REG-21 within 90 days, extendable by 60 days each by the Joint Commissioner and the Commissioner (totalling 180 days maximum). All pending returns must be filed before revocation can be granted. Revocation is approved in REG-22 or rejected in REG-05 after a show-cause in REG-23.

Documents required for GST registration

Proprietorship documents

For a sole proprietorship, the documents required for filing Form REG-01 are: PAN card of the proprietor, Aadhaar card of the proprietor, a recent passport-size photograph, proof of principal place of business (latest electricity bill or property tax receipt for owned premises, or a registered rent agreement with NOC from the owner for rented premises), bank account proof in the proprietor's name (a cancelled cheque, the first page of the passbook with name visible, or a bank statement of the last three months), and Digital Signature Certificate or Electronic Verification Code for verification. Proprietorships are permitted to use EVC (OTP-based) verification, which avoids the cost of obtaining a Class 3 DSC. Trade name (if different from proprietor name) and constitution details are entered in REG-01 Part B.

Private Limited and LLP documents

For a private limited company or LLP, the documentation expands considerably: company or LLP PAN, certificate of incorporation, Memorandum of Association and Articles of Association (for companies) or LLP Agreement (for LLPs), board resolution or LLP partner resolution authorising the signatory, PAN and Aadhaar of all directors or designated partners, passport-size photographs of all directors or designated partners, registered office address proof (electricity bill or rent agreement with NOC and latest utility bill), and DSC of the authorised signatory — for companies and LLPs, DSC is mandatory and EVC is not permitted as a substitute. Companies should ensure that the registered office address declared with the Ministry of Corporate Affairs matches the address in REG-01; any inconsistency triggers Rule 9 deficiency notices.

Partnership and HUF documents

Partnership firms file REG-01 under the firm's PAN with the partnership deed as the constitution proof. All partners' PAN, Aadhaar and photographs are required, along with an authorisation letter or resolution designating one partner as the authorised signatory. Registered office address proof and DSC or EVC of the signatory partner complete the file. For a HUF, the Karta files REG-01 under the HUF's PAN, supported by HUF deed, Karta's PAN and Aadhaar, photograph of the Karta, address proof of the HUF business location, and bank-account proof in the HUF's name. Both partnership and HUF can use EVC verification; DSC is optional but commonly used.

The REG-01 application process step by step

Part B — business details

Part B of REG-01 is filed after logging in with the TRN. It captures business details (trade name, constitution, nature of business activities), promoters / partners / directors (with PAN, Aadhaar, residential address, and photographs), authorised signatory designation, principal place of business (with address proof and ownership / occupancy basis), additional places of business (each with its own address proof), goods and services with HSN / SAC codes (up to five primary), bank account details (with proof), state-specific information, and a verification declaration. Part B is divided into multiple sections that can be saved progressively before final submission.

Aadhaar authentication or physical verification

After Part B is submitted, the applicant is given the option to opt for Aadhaar authentication under Rule 8(4A). If Aadhaar authentication is chosen, the promoter or authorised signatory receives an Aadhaar OTP for instant identity validation; this is the faster path and the application typically clears in 7 working days. If Aadhaar authentication is not opted for, or if authentication fails, the application moves to physical verification under Rule 25 where the proper officer visits the principal place of business, examines the operations, and uploads Form REG-30 within 15 working days. Physical verification adds time and the risk of adverse observations on premises-non-genuineness.

REG-03 deficiency and REG-04 reply

If on examination of REG-01 the proper officer finds the application incomplete or unsatisfactory, a notice in Form REG-03 is issued seeking additional information or documents. The applicant must respond within seven working days through Form REG-04 carrying clarifications and any additional supporting documents. If no reply is received, or if the reply is found unsatisfactory by the officer, the application is rejected in Form REG-05. A rejected application can be either re-filed afresh after addressing the deficiency, or contested by way of appeal under Section 107 of the CGST Act within three months of the rejection order.

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