Hello there, @-bolttelecommuni.
I can share the steps to help you add a reduction to your customer's invoice. For this, you can create a new item then add it to the invoice. Here's how:
Once done, add this to the invoice as another line item. Make sure to put a negative amount so the invoice total is reduced.
I've added a few related links for you:
Visit us anytime for other feature or general concerns about the program. I'll be more than happy to help you, especially for this invoice topic. Have a nice week ahead!
A nice detailed answer!
I would suggest mapping the Item to the appropriate expense acct (ex. equipment rental), and it may actually be taxable.
Another idea is to have a subtotal line after the sales items and before the deduction, so easier to differentiate the rev/exp when posting on their end.