Is there any way to set Line amount to be negative using a script or some other way? Right now, I can see that I can have a line amount to be negative as long as I have some other line amount resulting in a total of 0 or higher. I also found this suite answer: 49152: "It is by design that we cannot save an Invoice with a negative amount. In cases where more than one line item is getting billed, the positive line amount must be higher than the negative lines."