Add comments to invoice

When I create an invoice from Zoho Projects, the Project Tasks are listed as line items. I'd like the task notes/comments to also appear on the invoice.

For example, one task is "Training". When I fill out my timesheet, I like to add notes about who I trained and what topics were covered. The invoice has a one word description "Training" on it. Any way to add task comments to the invoice template?

Thanks in advance.