If you want to use Inventory management on a new or an existing product/service, turn on the switch here
We make a new product named "My awesome service" for this tutorial
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120101/original/k76e58cGIQU-1pwpKZTuWVq125p9k4EIEA.png?1607189039)
Then you can add Par level, Opening inventory, Purchase price
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120106/original/g_pvC9Tfq1_58dhCU7dVvtrFbpgBBRjeQg.png?1607189040)
On the products page, you can see the current stock level
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120107/original/UsCaKCEvDwJ4y_b8ZDbzagTjqc8riP6-OA.png?1607189040)
You can also see the stock level, under the Inventory value button
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120103/original/F5uyYtOaRdhnOd9r0bdgxQKyWLpMSyYfLg.png?1607189040)
Here is our example product
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120105/original/1UMaaA68sT_2rLnSGdiWmpHb13VRMUpHBA.png?1607189040)
If you want to increase the stock level of a product, you need to create a new expense
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120113/original/0jgAzheUO-TUCq9QYSeOEiYfBf2ArR9KiA.png?1607189071)
Select the partner from whom you purchased the product, or create an example partner just for that purpose
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120114/original/qiTMPVOA93ZDW037pi9WnJbJrNwthE5Xbg.png?1607189071)
Select the product, you want to increase the stock, and add it to the Expense document by clicking it
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120117/original/BVTgioStSVlKDMu8NQnGh_XW7ZT3QEgRCA.png?1607189071)
When you are done, just click Save
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120115/original/A5_TPndt6Y1SXiIf72AoZF1NqQ4oVTUHUQ.png?1607189071)
As you can see the stock level of the product is raised from 100 to 120
If the purchase price is not 0, the amount of the expense document will appear in the business statistics
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/36080120118/original/SbeVA3xjTSP5m3FwXa_EaX_D6xUQeEjivw.png?1607189071)
If you want to decrease the stock level of a product, you need to create a new Invoice