Create a custom input table in the format where the top row contains the heading for the columns and the rows/cells contain the client input

I want to create a custom input table in the format where the top row contains the heading for the columns and the rows/cells contain the client input

You can try to add a Configurable List widget in your form and set the field as needed. To help you in setting up your configurable list widget, you can check this guide: How to Set Up the Configurable List Widget.

I have cloned your form and setup a Configurable List widget so you can check. Here is sample cloned form: https://form.jotformpro.com/72074752363962.

Do let us know if you need further assistance.