In Kladana, in transactions, on the counterparty card, you can see that a company has a balance.
It is calculated based on transactions that you have added to Kladana.
Once you create a shipment to the client, the system checks whether there were payments for that amount. If no payment was made, the system highlights that amount in red beside the counterparty's name.
Kladana also checks transactions with suppliers. If you have paid for something, but haven't received the product for that amount, the balance will also be highlighted in red.
If the client overpays you or pays in advance, the balance will be highlighted in green. The same is true for suppliers. If you receive products but haven't paid for them yet, the balance will also be green.
Be aware that it calculates all payments and transactions, and it shows the total balance. It is not specific to a particular Sales or Purchase order.
You can also check your balance with the counterparty on the counterparty's card for more details.