Welcome back, @DVFFJohn.
Allow me to provide information about importing IIF files in QuickBooks Desktop (QBDT).
There are some limitations when you import IIF files in QBDT. Please know that importing a transaction file doesn't automatically link to an invoice or an invoice payment. It's the reason why your Account Receivable continues to increase. You'll want to ensure you link the imported transactions to decrease your Account Receivable. To do so, you can go to the Receive Payments window and link it from there.
I'm adding this article for more details about the IIF import limitations: Export, import, and edit IIF files.
You might also want to import transactions with MS Excel files to QuickBooks Desktop. This article will guide you through the process: Import or export MS Excel files.
Should you need further assistance importing transactions in QBDT, I'm available here to help any time! Wishing you continued success, @DVFFJohn.
