Application to GSTIN, handled end to end — including queries and physical verification.
If your business has crossed the turnover threshold, supplies goods or services across state lines, or sells through an e-commerce platform, GST registration is not optional. We handle the entire application from document preparation through to the GSTIN certificate — including Aadhaar authentication, responding to departmental queries, and attending to physical verification if the officer calls for it.
Who needs GST registration
Tamil Nadu is a normal-category state, so the standard turnover thresholds apply:
Goods: aggregate turnover above ₹40 lakh in a financial year
Services: aggregate turnover above ₹20 lakh in a financial year
Registration is compulsory regardless of turnover in several cases, including:
Inter-state supply of goods
Selling through an e-commerce operator (Amazon, Flipkart, Meesho and similar)
Persons liable to pay tax under reverse charge
Casual taxable persons and non-resident taxable persons
Input Service Distributors and agents supplying on behalf of others
Persons required to deduct TDS or collect TCS under GST
Voluntary registration is often worth it. If your customers are GST-registered businesses, they will usually prefer a supplier who can pass on input tax credit. Many of our Chennai clients register voluntarily below the threshold for exactly this reason.
Documents required for GST registration
Category
Documents
Identity & PAN
PAN of the business or proprietor, Aadhaar of proprietor/partners/directors, passport-size photographs
Business address
Latest electricity bill or property tax receipt; rent or lease agreement plus a No Objection Certificate from the owner if premises are rented
Bank details
Cancelled cheque, bank statement, or first page of the passbook showing name, account number and IFSC
Constitution proof
Partnership deed (firms); Certificate of Incorporation, MOA and AOA (companies); LLP agreement and COI (LLPs); registration certificate (societies and trusts)
Authorisation
Board resolution or letter of authorisation naming the authorised signatory; Class 3 Digital Signature Certificate for companies and LLPs
How the process works
Document review. We check your address proof and constitution documents first — mismatched or expired address proof is the single most common cause of rejection.
Form REG-01 filed. Part A generates a Temporary Reference Number; Part B carries the business details, place of business, HSN/SAC codes and bank particulars. An ARN is issued on submission.
Aadhaar authentication. Authentication is completed for the promoters and authorised signatory. Where biometric verification is required, we tell you which GST Suvidha Kendra to attend and what to carry.
Departmental query, if any. If the officer raises a query in Form REG-03, we draft and file the reply in REG-04 within the permitted window.
GSTIN issued. The registration certificate is issued in Form REG-06 and downloaded from the portal.
How long it takes
Where Aadhaar authentication is completed successfully and no query is raised, registration is typically granted within about seven working days. Where authentication is not completed, the application is flagged for risk, or the officer directs physical verification of premises, the process extends to roughly thirty days. We track the ARN daily and respond to any notice the same day it appears.
After you get the GSTIN
Registration starts the compliance clock. Returns become due whether or not you have made any sales, and nil returns still have to be filed. We take over the monthly and quarterly filing from day one if you want it handled — see GST return filing.
Frequently asked questions
Yes. A residential address can be used as the principal place of business provided you can produce valid address proof — typically the latest electricity bill or property tax receipt, plus a No Objection Certificate from the property owner if the premises are not in your name.
Companies and LLPs must sign the application with a Class 3 Digital Signature Certificate. Proprietors and partnership firms can complete the application using Electronic Verification Code through Aadhaar-linked OTP.
Operating without registration when liable attracts a penalty and the tax dues have to be paid for the entire unregistered period. Where the failure is treated as deliberate evasion, the penalty can be substantially higher. If you have already crossed the threshold, contact us and we will assess the exposure before filing.
GST registration is state-specific. If you have a place of business in Tamil Nadu, you need a separate Tamil Nadu GSTIN in addition to registrations held in other states.