-> They need to register on https://topneedservice.com/ to get a login account.
After that, they need to click on Vendor mall ( https://topneedservice.com/VendorMall ) and fill the form and upload all KYC documents :
Business Logo ,
Trade License,
GST:
Business location by using geolocation,
Vendor Address
City,
Pincode,
Business owner Full Name,
Aadhar , PAN document Image (PDF, Word, or Image),
Bank account Number
and cancel cheque Image for bank account number (PDF, Word, or Image).

Admin users verifies it and then creates the Vendor account like https://topneedservice.com/Vendors/Das%20Chicken and gives the vendor role to the user.