There are a number of instances where it may not be possible to have charges automatically captured as part of regular winery work. This may include any admin or paperwork fees that you on-charge to the customer.
Like your other billable items you can create billable Items that are not linked to any operation or action under Winery Setup > Billing > Items. You can then add charges by using Add charges under Winery Setup > Billing > Service orders.
On the selected service order click Add charges.
Select the Wine batch or Stock item that you want to link to this charge or you can select a General charge.
You can manually enter the billable item and use Add line to add more. A Note is mandatory for this method of adding charges that should describe accurately the reason for the charge. You can elaborate in more detail using the Line note field on a per item basis. Click Save to confirm the charges.