Thanks for choosing QuickBooks for your business, mwillis.
I can help you migrate your company data in your QuickBooks Desktop.
QuickBooks follows a specific file format. For your transactions to migrate successfully make sure your Excel spreadsheets have the correct header placement. For your guide, you can refer to this article: IIF Overview.
You indicate you are familiar with processes and steps to accurately convert BW data to QBE importable format. Can you assist or direct me to a third party conversion company to perform such a service?