Review the saved item separately from the rate used on a particular invoice.
1. Open Items
Go to Items. Search by the product name or SKU, then open or edit the intended item.
2. Check the item details
Review its type, SKU, description, unit, selling rate, and tax. Keep the selling rate separate from purchase cost.
3. Check stock where applicable
For an inventory product, open Items → Inventory → Stock to review quantity and recorded cost. Use Movements to trace receipts, sales, and adjustments.
4. Review each sale
When you add the item to an invoice, check that invoice’s quantity, rate, and tax. A changed current rate does not rewrite old documents.