If you need to make adjustments to an order to add or remove products, adjust sales tax, etc., you can do so by selecting ‘Revise Order’ from the menu to the right of the order on the job's Quotes & Orders tab. Once you’ve adjusted it, you can then Save & Book Revision.
Your invoice number will be revised to include ‘R1, R2, R3…’ depending on the number of revisions that are made. You then choose View Revision History to see the different versions that exist.
If you need to edit the invoice breakdowns in any way, you can do so through the Edit Invoices option.