We need a function wherein if any changes are made to the Invoices, Payments, or Credit notes, respectively of a particular customer, a trigger is given to get the total Invoice/payment/credit note amount.

Trigger on:

1. Invoice add or edit

2. Payment add or edit

3. Credit note add or edit

Can anyone in the Zoho community help with this as Zoho Books support has reverted that it is not possible to write functions for these requirements