[mjnaus]

Since we've opted for a flexible item table structure (not every business out there requires the "item", "description", "item price", "total" structure) the table columns can pretty much anything, so the application currently have no way determining what to multiply with what.

Not sure about the number of digits in the totals, but obviously this should be unlimited. On our own installation we're in the for digits, so there should not be an issue with this.

Discounts are located in the Financials tab. It's a simple invoicing app, so there's no way to specify a discount based on when the invoice is paid (nor are we likely to implement something like this).

Terms can be placed in the invoice footer.