@HCF-Bookkeeper 

Are you using a third party app and only exporting data to IIF? The following steps allows an IIF file to be opened in Excel.
Save the IIF file locally
Open Microsoft Excel and in Excel, select FILE > OPEN
In the drop down for file type, change to ALL FILES (*.*)
Browse and select the IIF file
When the Text Import Wizard appears, select DELIMITED and NEXT
Select TAB as the DELIMITER
Select FINISH
Select FILE > SAVE AS and change the SAVE AS type to an Excel workbook