Why GST matters for online sellers
GST is the indirect tax charged on most goods and services in India. If you sell through a marketplace, the marketplace needs to know your tax registration so that invoices, tax collected at source and your payouts can be reported properly. That is why almost every major marketplace asks for a GSTIN when you register.
Having a GST number is also useful beyond marketplaces. Buyers and distributors often want a tax invoice, and registered businesses can claim input tax credit on eligible purchases, subject to the rules. Planning this at the start saves problems later.
Who needs to register
The rules depend on what you sell, where you sell, your turnover and whether you sell through an e-commerce operator. For many goods sold through marketplaces, registration is required, but there have been exemptions and conditions for some small sellers, and rules change from time to time. Do not rely on a blog post alone, including this one.
Confirm your situation on the GST portal, with a chartered accountant or with a compliance provider before you start. Doing so avoids both unnecessary registration and the more costly mistake of selling without a registration you needed.
Documents you will typically need
Gathering the right documents before you begin shortens the process, because the department may ask for clarifications if details do not match.
- PAN of the proprietor, partners or company
- Aadhaar of the proprietor, partners or directors, with a recent photograph
- Proof of business address, such as an electricity bill or property document
- If the premises are rented: a rent agreement and a consent letter from the owner
- Bank account details or a cancelled cheque
- Business details: name, type of entity and a description of what you sell
- A digital signature or authorised signatory details for companies and LLPs
How the application works
You apply on the official GST portal. After entering your PAN and mobile number, you verify them using one-time passwords, fill in business, promoter and address details, upload the documents and submit with a signature. An application reference number is generated.
The department reviews the application and may ask for more information or a physical verification. If everything is in order, the registration is approved and a GSTIN is issued. The timeline varies. It is often a matter of days when documents are clean and consistent, but queries add time.
- Enter PAN, mobile and email and verify them
- Fill in business, promoter and place of business details
- Upload documents and submit with e-signature or Aadhaar authentication
- Respond promptly to any query from the department
- Receive the GSTIN and registration certificate
What you file after registration
Once registered, you file periodic returns. Regular taxpayers usually file a return of outward supplies and a summary return that reports tax payable, and some small taxpayers may be eligible for a quarterly option. The exact return forms and schemes can change, so check the current options on the portal.
If you sell through a marketplace, the marketplace collects tax at source on your sales and reports it, and this appears on the portal for you to claim as per the rules. Reconciling your marketplace statements with your returns each month avoids mismatches.
Common mistakes
The most frequent problems are simple. They are also easy to prevent with a short checklist.
- Different business names or addresses across documents
- Registering in the wrong state, or not registering in a state where you keep stock
- Missing return deadlines, which leads to late fees
- Not reconciling marketplace reports with your own sales records
- Using personal details inconsistently, such as a mobile number that belongs to someone else
How MarkeTech can help
We prepare the GST application, review your documents, file returns and help reconcile marketplace data. We are not a law firm, and for tax planning or notices that need representation we recommend a qualified chartered accountant. See our compliance services or call +91 9717950166.
Last updated 28 Oct 2026. Rules and platform policies change. Confirm current requirements on the official portal or platform before acting.

