Hi there, @Adi2. I’m here to impart information about preventing sales when you have negative stock items.

The option to prevent QuickBooks Point of Sale from posting sales when the inventory stock is zero or negative isn't possible.

I recognize your need for this feature. No worries, I’ll be sharing your post with our management team so they can take a look and might consider this idea as part of the future enhancements.

Here’s a guide to get more tips about handling your company's income: Sales and customers. It has everything you need to track invoices, sales receipts, and other sales forms.

I appreciate you for reaching out to the Community. If you have any other questions or concerns about managing your sales and inventories, please don’t hesitate to add them to your reply below. I’ll be here to help you out. Have a good one!