Go to tab: "Payments" and select "New payment"
Click "Add payment" to start entering data about the payment received, this payment can be for one or multiple invoices.
You can here add a reference for the payment. If an invoice number was given with the payment please enter this in the reference field.
Select the payment method to use for the payment, the payment method defines what G/L account is used for the payment amount as well as G/L account for potential bank fees, currency rates gains or losses.
If you entered a correct invoice reference, this invoice is now listed in the bottom section. If the invoice is not found or you want to allocate the payment to one or multiple other invoices you can add them by clicking "Add settlements".
When an invoice is selected into the payment, in the field "Payment amount" you can enter how much of the payment to allocate to each invoice.
If you have additional payment amounts that you can't/don't want to allocate to an invoice, you can write off payment amount with the button "Write-off".
Post the payment by clicking "Post payment".