Negative Quantity on Hand (QOH) in QuickBooks happens when items are sold before being received, leading to incorrect COGS, financial report errors, and data issues. It’s often caused by poor inventory control or drop-shipping. To detect it, run the Inventory Valuation Detail report. Prevent it by recording purchases before sales. For existing issues, professional QOH repair services can restore data accuracy. https://etechca.blogspot.com/2025/07/quickbooks-negative-quantity-on-hand.html #QuickBooksRepair, #NegativeInventory, #QOHFix, #QuickBooksHelp, #InventoryIssues, #QuickBooksSupport