• Find your invoice
• Select Edit in the Actions column of the invoice you wish to make changes to
• Once the Invoice is open, find the line item you wish to edit and select Edit Amounts
  
  
  
  
• If the Invoice has already been approved and issued you will be prompted that a Credit Note needs to be created. 
• Select Credit Invoice - The Invoice will be credited and a new Invoice created and opened
  
  
  
  
• You may now edit the line item amounts and / or tax rates
  
  
  
  
• Click Update to finish.