Will the invoice number count up in test payments?

No, invoice numbers for test payments will not affect the count of real invoices. In the case of test payments, a fake invoice number will be generated, typically following the format of the next real invoice number with a 'T' appended at the end. For example, if the next real invoice number is KJB2023-0003654, the test invoice number could be KJB2023-0003654T. These test invoices are separate from the actual invoicing sequence and will not disrupt or impact the numbering of real invoices.