Hello:
In addition, you can see actual import files and import templates. Open the Payables sample data (located in \Softrak\Payables\Samdata folder). If you look at File - Import - Invoices, you will a number of import templates. There are several choices in recent versions, fewer in older versions. But you should see at least one - "Invoices Default". It imports a file named "APINVIM.CSV". This template is the bare minimum. Using the documentation from Steve, you can convert the CSV file to Excel, add columns and adjust the import template.