Manage Inventory from the Manage Account Website.
1. From your computer, log into the InvoiceASAP Manage Account Website.
2. Click on Settings.
3. Click Inventory Settings.
4. Select Yes and Save.
Each product has an on-hand quantity available for you to add the quantities of your items. When you add the product to an invoice, the total inventory quantity for the item is reduced by the quantity added to the invoice.