How can I send my accounting managers’ report to someone else by email to review and make some input?
What report(s) are you referring to? You can create these under reports tab (see guides) and save them as PDF and send them using your email application.
…or (as indicated in this Guide) use the option Copy to clipboard and paste in a spreadsheet for further manipulation.
I flagged your crosspost, but also commented the following:
In any case attaching files to your email application is a question for the email app. You can also enable PDF generator in Settings → Obsolete features. In settings also provide SMTP server settings. Then the view screen will allow emailing from Manager but not back into it. You want someone to comment and return that feedback so better to Print to PDF and attach that using your normal email application.