Im surprised that since a request back in 2015 the feature to be able to attach documents from an intray to sales, receive money and receive payments. It is so important to be able to attach purchase...
This feature definitely should have been done by now. You mustn't have actual bookkeepers that let you know what are good ideas or not otherwise the features that actual customers are asking for, which majority are in the bookkeepping arena would have been implemented by now. Waiting 20 years for a function is just unbelieveable.