Per-Diem rate - manual deduction in addition to meal type based deduction

Summary:

We have a requirement where our client needs per diem calculations to be based on GSA rates, specific to each geographical location. Additionally, meal-based deductions are required and we are currently able to utilize the standard meal-type-based deductions functionality available in Oracle Expenses.

However, beyond the standard meal deductions, the client also wants the ability for users to apply additional manual deductions directly on the expense report, as these deductions can vary on a case-by-case basis (e.g., hosted meals or other exceptions).

While we understand that it's possible to configure additional deductions through the expense policy setup, our requirement is for users to have the flexibility to enter these manual deductions at the time of submitting the expense report, rather than having them predefined in policy rules.