Invoices which have not yet been finalized will have "Pre-Bill" written at the top. Keeping an invoice unfinalized enables you to make changes before sending it out. Once you finalize an invoice, changes cannot be made and "Pre-Bill" will no longer appear on the invoice.
- Click on Invoicing tab from your blue menu bar
- Click on the desired invoice
- Click on the Finalize button
If you need to make further changes to a Finalized invoice, you will see an Unfinalize button which will place the invoice back into a Pre-bill state.