What are Intuit Interchange Format (IIF) files?
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Intuit Interchange Format (IIF) files are text files that QuickBooks uses to import and export data. You will find the QuickBooks IIF import and export utilities on the 'File' menu in the QuickBooks program.
Importing and exporting IIF files created by QuickBooks is fairly easy because QuickBooks formats the file for you. However, creating IIF files from scratch or adapting data from another program is technically complex and may be difficult if you don't have experience formatting delimited text files. In that situation, it may be faster and easier to enter the information directly into QuickBooks unless you have very large amounts of data to import.
Use IIF files to: