Hi JShore , editing a purchase after a sale has been recorded will not change the cost of that sale, which is determined when the sales invoice is recorded, and is not subsequently changed. What editing a bill does is change only the stock value, and therefore the item's average cost, which will now be incorrect, which will affect subsequent sales and show a wrong gross margin.
If you must change a purchase bill, you need to make a stock adjustment on any/all items on that bill to bring them back to what they should be.
Also note that since a recent version, changes to sales invoices after first recording do not result in updating cost of sales when the invoice is changed and re-recorded.
Have your Analyse Sales reports been correct in the past?
What AccountRight version (country/number) are you using?
