This tab will be available only if you're going to configure a module that has the Inventory block enabled, like Quotes, Sales Orders, Purchase Orders, Invoices, DDT etc..
Here you'll be able to set the following parameters:
- Enable Inventory Block: if enabled then an Inventory block with all the related products will be shown at the bottom of each record details page.
- Inventory Currency Field: You can set here the module field to specify the used currency for each record, if set to default then the general portal currency will be used.
- Inventory Line Fields: Here you can toggle all the fields that should be shown for each product line in the inventory block, it's possible to set common fields for Products and Services but also specific fields for the Product/Services module.
- Totals Fields: these are the summary fields shown at the bottom of the products block, you can show for example the Discount, Taxation, Total Before and after Tax etc..