Thanks for the reply on the thread, MelD50.

We know that you have a large number of line items to import as zero quantity. I suggest using a third-party application for this task. I can provide you with the steps below:

Here's how:

1. Login to your QuickBooks Online.
2. Navigate to the left menu and then select 'Apps'.
3. Click Find Apps.
4. Type the desired apps into the search bar and press the search button.

Once you are connected to the desired third-party apps, you can begin importing your inventory.

I'm adding this article for more guidance: Change product and service item types in QuickBooks Online.

Just in case you want to run and customize reports to keep track of your inventory, you can check out this article for detailed steps: Use reports to see your sales and stock status.

Come back to this post if you have any other concerns or further questions about products and services. I'll be here to assist you.