There is a bug in creating invoices in QuickBooks Online.

I have to attach some files to my invoice (timesheet, expense receipts). I try to attach a spreadsheet (.XLSX file) that is open in Excel. The attach fails. I get an error message. I cancel the attachment by clicking on the x by it. I close the Excel file and try the attachment again. It works this time. I try to send the invoice, but I get an error message saying that there was a problem with a file attachment and I need to try saving again. I try saving the invoice, same problem. Long story short, I have to hit refresh and start all over again. 

This is a bug. I should have been able to continue with my invoice after I cancelled the "failed" attachment. Never mind that I should have been able to attach the file while it was open in Excel in the first place. How can I report this bug?

Thanks very much,

- Bill.