Your credit account invoices will be listed in Koho on the Invoice page.There you will find a table with all your shipment invoices, the credit account invoices will be part of that list. The credit account invoices will have the status of "View in Credit Account". You can click on that row in the table to be taken to your credit account. There you can see all of your credit account invoices and pay them.From your Credit Account you can click on the invoice ID and a new tab will open with a PDF of your invoice.
Credit Account Application
Credit Account Setup