Invoicing settings must be configured first; otherwise, the module will not work correctly.

In order to do this, go to Settings > Billing and Invoicing

Once you access this section, you will see the following options:

Let's look into them one by one

• This setting allows administrators to make any status change, including changing voided and invoiced invoices
• Note: to delete a voided invoice, the users (with permissions) must first change it back to 'open'