Send QB file to accountant including saved invoices

I'm using Quickbooks desktop. I send my QB file to my accountant to prepare the corporate taxes and financial statements, I generally send them a back up file. During their work, they routinely request invoices (like capital asset purchase invoices or expense invoices). I have all this saved in my Quickbooks file, so it's easy enough to send it to them, but it would be even easier if they could print it out of their version of the Quickbooks file. How can I send them a file that let's them print/view invoices directly through Quickbooks? 

Thanks,