1. In Accounts Receivable, go to Records>Invoices and open the invoice that needs to be adjusted.
  2. Go to the line item tab and open the line item.
  3. On the open line item, in the menu bar click the button that looks like an X made out of a wrench and a hammer.
  4. On the new adjustment window, on the Adjustment tab, fill out the adjustment date, the adjustment post date and the reason for the adjustment.
  5. Then go to the new Distribution tab and enter the changes to the posted distribution. Then click Ok to save the adjustment.
  6. Save and close the line item. Then save and close the invoice. 
  7. Then post the adjustment to the General Ledger.