Budgets - include income fields

Currently, only expense fields are included for calculating if I am over/under budget, and any income category is not included in budget. However, to remain in my budget, I often return purchased items which are reflected as 'income' as per your app. Now, effectively I have kept myself in budget, but due to app limitations, it's not showing that my NET Expense has remained budget. Please suggest a way forward to remediate this issue.