Let me share additional information, @KathyS.

When importing your inventory items, make sure to scroll to the right direction so you'll be able to see the rest of the import columns. From here, you can copy and paste the Maximum quantity for each item you're about to import.

You can read through these articles to learn more about importing items in QuickBooks: Import or export MS Excel files.

If you're still having the same result, let's run the Verify and Rebuild data utility tool. This will isolate, repair, and notify you of data damage within your QuickBooks company file.

Here's how:

1. Go to the File menu.
2. Choose Utilities.
3. Select Verify Data.

Once completed, you'll receive any of the following prompts:

• "QuickBooks detected no problems with your data," no further action is needed.
• A specific error message, there may already be an article for it.
• "Your data has lost integrity," indicates there is data damage in the file.  Continue to the steps below to Rebuild Data to correct the problem.

To rebuild your data, here's how:

1. Go to the File menu.
2. Choose Utilities.
3. Select Rebuild Data on the drop-down.
4. Choose OK. Follow the prompts to save a backup.
5. Click OK when you see Rebuild has completed.
6. Now, go back to File, then Utilities and select Verify Data one more time.

You can check this article to learn more about resolving possible data issues in QuickBooks: Verify and Rebuild Data in QuickBooks Desktop.

Feel free to leave your comments below if you have other questions. I'm always here to help.