Added comment in an invoice can also be added or edited as per requirement. This process can be done by following the below process
Business Portal > Sales > Sales Order New > Invoice Selection > Edit Invoice > Edit Comment
Go to the invoice whose details are to be changed
Open the details of invoice
Click on “Edit Invoice” button and comment section will become editable
Add/Edit the comment in the invoice and click on “Update” button
Your latest comment will be updated in the invoice
