category based custom fields
Custom fields should come up based on the category you choose for the expense.
Validation Rules and Dependant fields are an absolute must in order for me to help you gain adoption from my users. We are coming off of Concur and while I appreciate many aspects of the Zoho Suite of tools, they are lacking in key areas like this. Keep the development pressure on is my advice. You have a great thing going and I have confidence in you!
Janis Colella commented
This feature would be great for personnel, corporate tax and VAT purposes in the UK. If the category is business entertainment then a customs field/s would pop up for the following information on attendees: their names, number of overseas attendees, number of third party attendees and number of local employees.
Jean-Yves Bisiaux commented
I need this!