Do you have any samples templates?
A collection of sample import templates are delivered with the software distribution. They are located in the samples directory. The sample templates import data into the QuickBooks 'Sample Rock Castle Construction' file.
The import data is in sampledata.csv, which is ';' separated.
sCustomer - creates a new customer
sInvoice - creates an invoice for the customer
sSalesReceipt - creates a sales receipt for the customer
sCustInvoice - creates a new customer and an invoice
sVendor - creates a new vendor
sBill - creates a bill for the vendor
sCheck - adds a check paid to the customer
sCharge - add a charge