Documents Needed to Register on Amazon India
Amazon.in asks for your GST number and PAN when you register, along with a bank account, email and phone number. If you only sell tax-exempt products such as books, you can choose that option instead of giving a GST number.
You can list without a trademark as Generic, though Generic items may need a barcode or a barcode exemption. Listing your own brand needs brand approval, and Brand Registry needs a registered or applied-for trademark.
