Invoices need correcting, settling and occasionally cancelling. Each of those is now an explicit action with a visible result.

Adjustments on the Invoice

Add a credit or a charge to an issued invoice as an adjustment, so the correction is recorded rather than hidden in a reissued document.

Mark as Paid, or Void

Settling an invoice and voiding one issued in error are separate actions, and the invoice shows which happened.

Price Lists per Customer Type

Separate price lists for B2B, B2C and suppliers mean the right prices reach the right invoice without manual substitution.