Hi there, @222Rebecca. 

Thanks for following along with the thread and sharing your concerns. 

Depending on what information you're trying to import, you can import Excel files into QuickBooks Desktop. You can import Customer, Vendor, Items, and Chart of Accounts from an Excel spreadsheet. There are several options available when importing Excel files from QuickBooks.

For additional information about importing Excel data, check out Import or Export MS Excel files. 

However, if you're looking to import other data, then yes, you'd need to convert your files into IIF format or use another format type. To do this, you may consider using a third-party application to import your data. To do so, I'd recommend visiting our QuickBooks Apps page. 

Please let me know if you have any questions or concerns. Take care, and have a wonderful day!