How can you click on the unbilled and billed? When i click on the billed it just goes straight to the payroll check that it was done on.

I created an invoice and included billable time but forgot to do the markup so i went back and deleted the invoice. When I went back to create new invoice the billable expenses were not there anymore and when i go back to the reports it shows as billed. I need them to be unbilled so I can create a new invoice.