Deposit & SO Plugin is an add-on function for AutoCount Accounting user.It mainly help in record deposit payment received from customer at Sales Order (SO) either in 100% or partial. If there is a compulsory minimum payment amount need to receive in%, you can preset in the setting. 

When the stock is delivered, user can key in the quantity in Sales Order and it will trigger the system to generate Invoice or Delivery Order automatically based on the setting.

And later on at SO, compare to conventional way, user can dorect record payment received at SO instead go AR Receive Payment to do so.