Data entry form among my agents

“I want to share a data entry form among my agents.If they find a suitable customer for my business, they enter the data in the form.After that I can see which agent has given me the details of which customer”

Is there any online application suitable for this?.Any other way.

For now, the easiest path is to integrate Google Forms or Jotforms into your site, and use a login requirement.

With Google forms, your agents would need a Google email, and to be logged into that account, but then you can easily match who submitted the form with the person who submitted it.