How to manually create quantities of stock in Odoo

To add quantities of stock that haven't previously had quantities in Odoo you will need to do an inventory adjustment through the inventory app

Navigate to the Inventory App

Navigate to Operations -> Inventory Adjustments

Create a new Inventory Adjustment - Give it a relevant name to the adjustments you are making and add the products you wish to adjust

Once all information is in click 'Start Inventory'

You can then 'Create' and 'Count' the stock on hand

Once finished hit 'Validate Inventory' and the new stock figure will be saved in the system.