To post invoices in BillQuick:
1. After billing your client, open the Invoice Review screen.
2. Select the invoice (or range of invoices) to be posted.
3. Click the Post button on the button panel. The invoice record turns blue.
4. Refresh the screen. If you attempt to change the invoice number, memo or date, it does not allow you to do that.
This means the invoice is posted and hence un-editable. Also, you can consider using the Closing Date field on the Company screen to lock changes before that date.
