Alert trigger for user while creating a new trip in Zoho Expense

Alert trigger for user while creating a new trip in Zoho Expense

Hello everyone,

I created one custom field. I need to create a custom alert/validation for that field.

For Ex: User, only needs to select the trip date after 30 days from current date.

Like Zoho CRM or Zoho Creator, we not unable to write code in Zoho Expense.

Is there any way to achieve this?

Any suggestions/reply would be helpful.