I'm playing catch up in the QB Desktop Enterprise.  I just sent 2019 to the accountant and last year there are a lot of open invoices that need to be changed to estimates so I can add progressive invoicing since we are a consultant who works on contracts and as we do the work, the contract is paid down.  When I tried to do the workaround, it would not let me delete the invoice because the accountant has a copy of last year's file.  Is there a way to delete the invoice or otherwise mark it so I can go back and delete it once the CPA sends my file back?