How to create a credit note.
To do this follow the following steps:
Step 1. Click on Control Menu then Click on Vendor Bills as shown below.
Step 2. On the page that opens, click on the bill you want to create a credit note.
Step 3. On the register payment page that opens up, click on Ask for a credit note as shown below.
Step 4. On the page that opens up, fill in the reason and click on Add credit note as shown below.
A credit note is created as shown below.
Step 1. Click on the specific document in this case the one highlighted in blue.
Step 2. On the new page that opens up, click on edit as shown below.
Step 3. Type the correct values in this case the price was 1500 and changed to 1200 as shown below and click validate.
At this point you can continue to register payment as discussed earlier.