Adjust an order

Really need a way to adjust or cancel an order so the items sold in the database is updated. We can refund money for all or a portion, but when I run a sold report, it still shows that I sold that item which I didn't and the amount of revenue still is reported and shouldn't be. We need to be able to not just refund, but update our entire record of what was sold and for how much. Instead when I transfer sales at the end of the month to my GL system, I have to remember to correct those sales I changed manually.