Creating a Bill against the Purchase Order

1. Click on the Purchase > Orders > Purchase Orders

2. Select the purchase order which has the billing status Waiting Bills

3. Click on Create Bill

3. It will be opened in the Draft stage

4. Replicate the information that comes from your supplier and fill in the details.

5. Click on Confirm

The bill will be now on Posted stage. When you go back to the purchase order, the billed quantity per order line can be seen as follows: 

You can also watch this video for reference: