Custom Payments to Agents

We would like to request a feature where the agent invoice payment can be customised instead of just marking it as paid.

Most of the times in our organisation the agent deducts upfront commission which could be more or less than the actual amount calculated by the system. So we want to have transparency regarding the payment required and payment received. 

Say, the amount due to Agent is $700 (inc GST) but they have deducted $770 (amount +GST) which means the agent owes us $70 and we want to reflect the same on Agent portal that they owe us $70 or other way round, sometimes the agent is paid $600 instead of $660, here the organisation has made a partial payment and still owes $60 to the Agent which should again reflect on Agent Portal.

These features of Overpayment or underpayment should be introduced in order to have an integrated system.