The question to extension provider should go as "We have a offline application software (in VB .Net) for monthly billing and invoicing. So now, we also want to take online payment. On monthly basis, we want to import the csv or excel data with few required fields like, membership number, name, email, mobile, month, amount. So once the data is imported, user can go to his frontend dashboard and can able to pay his monthly billing amount and can able to see history of his payments, that's it." So how we can achieve this requirement, we expect suggestion and best flow for this requirement. Thanks in advance. Regards,