Sales Invoices can be amended and credited on Etz which is usually the preferred option, although there is a Void option which completely removes the invoice from the system. Firstly you should consider whether it is appropriate for your process to use the Void option as this may not be advisable if you have issued it to you client and/or exported it to your accounts system.
You must enter a reason for the audit log:
When you click Void Invoice the invoice will be removed and the timesheets will be directed back to the Create Sales Invoice area where they can be re-invoiced or cancelled as appropriate:
Please note the Invoice number from the voided invoice will not be reused by the system. There is a Voided Invoice List within the Other Reports section of the Report menu which details any invoices that have been removed: