For an overview of EQ to QuickBooks compatibility and data that can be exported from EQ and imported into QuickBooks Desktop see this QuickBooks IIF article. This article covers how to export sales invoices from EQ into an IIF export file ready for QuickBooks (desktop).
Exporting sales invoices/credits
To follow these steps you will need to have raised at least 1 invoice or credit note for a sales order. See sales invoices overview. You may also want to export your customer list so that your customers and same account codes exist both in EQ and QuickBooks. See export customers (csv).
1. From the top menubar click File > Export... > Export Sales Invoices:
2. In the screen that opens enter invoice date range to search for invoices:
3. Click Search and a list of invoices and credit notes will be shown (as above)
4. Tick all of the invoices/credits you wish to export (or click Select All at the bottom).
Then click Export Sales Invoices.
5. The final screen allows you to set a location by clicking the options (...) button and browsing your computer for a folder.
Select File Type as QuickBooks2003
6. Click Export.
The IIF file will be saved to your chosen folder.
Once you have generated the IIF file successfully, you should follow these QuickBooks instructions on how to import your transactions.