Thanks for getting back and providing detailed information about your concern, @Mal2020.
The error message you receive when importing is related to how your file is created. To ensure you'll successfully import the IIF file, ensure to verify the file first. Double-check the account names used, the spelling and any other typographical error. You must confirm that the names used exist and are acceptable in QuickBooks.
You'll want to download the sample .IIF file in the article I'm including below and check to make sure your format is correct as the file name corresponds with the transaction type you're importing.
Additionally, to learn more about importing IIF files, here's an article that you can read: Export, import, and edit IIF files.
If you have any questions about importing in QuickBooks or have any questions at all. You can reach me at any time by replying below. I look forward to hearing how these steps worked for you. Have a great day!
