Cannot import Excel Item List into Product/Service without quantity on hand

Hello, @sychan.

Let me explain further about importing Products and Services in QuickBooks Online (QBO). 

You're unable to import the list without quantity on hand because this is one of the important information while importing in QBO. I'd suggest importing the inventory list again with the quantity on hand then adjust the number right after. 

Before diving in, we'll have to keep in mind that once a list is imported, it can't be undone anymore. Also, we can only import a maximum of 1,000 rows at a time. I recommend splitting up your list into smaller files if it's longer than that. 

To know more about the process, check out this article: Import products and services from Excel.

Once you've done importing, let's open Products & Services to override the number. Please note that QuickBooks Online automatically records appropriate adjustments to your stock Asset and Cost of Goods Sold (under stock Shrinkage) accounts.

Here's how: 

1. Go to the Gear icon at the top. 
2. Select Product& Services. 
3. Put a check on those inventories that need o to be edit, then click the Batch drop-down and choose Adjust Quantity. 

         4. Hit Save and close. 

For the detailed guide, please refer to this article: Adjust inventory quantity on hand.

You can always open a different inventory report to check the stock, status, and the best seller item. For more information, visit this article: Use reports to see your sales and inventory status. 

Additionally, I've attached helpful articles about how to add inventory items and resolve the negative amount. 

• Set up and track your inventory
• Fix negative inventory issues

I'm just a post away if you should have any questions. Have a lovely day.