I appreciate your participation in the Community thread, @RHSchmuck. Ensuring your data accuracy is our top priority. Allow me to assist you in getting back on course.

Based on the information you provided in your post. To maintain data accuracy, I recommend utilizing the Verify and Rebuild tool. The Verify tool identifies common issues within a company file, while the Rebuild tool addresses and corrects them.

To verify your company data, follow these steps:

1. Go to Window and select Close All.
2. Click File and then click Utilities.
3. Choose Verify Data.

To rebuild your company file data, follow these steps:

1. Go to File, then Utilities, and click Rebuild Data.
2. Follow the prompts and select OK.
3. Choose where you want to save your backup and click OK.
4. Enter a new name in the File name and click Save.

Visit this article for more detailed information: Verify and Rebuild Data in QuickBooks Desktop.

If you are still experiencing issues after completing the instructions outlined above, I recommend contacting our Customer Care Support. They have additional tools to access your account, conduct a remote session to determine what causes this behavior, and help you fix it.

 Here's how:

1. Open QuickBooks. Go to Help.
2. Choose QuickBooks Desktop Help or press F1 on your keyboard.
3. Click the Contact Us.
4. Enter your concern in the description box and select Continue.
5. Choose either Chat with us or Have us call you.

Please check out this article for QuickBooks support hours: Contact QuickBooks Desktop Support.

In addition, you can read this article to know more about importing/exporting IIF files in QBDT: Export or import Intuit Interchange Format (.IIF) files.

You can count on me to provide further essential resources and details regarding importing within QuickBooks. Kindly comment below for any questions you may have. I will ensure a prompt response. Have a great day ahead!