Has Reckon been able to Add a discount column to an invoice at all yet in any of their versions?

Hi there Gem,
We don't have a specific column for discounts, instead they are an item type on invoices. You can set up a discount item and it can be used after each item, or alternatively, if you'd like to discount the whole invoice, you can apply the discount after the subtotal of all items on the invoice.

More info -
How Do I Use Discount Line Items?