You can schedule a report to be emailed, to schedule a report do the following:
1.- Go to WC Invoice/Reports
2.- Click in the schedule column
3.- Select the date when you want to send it and if you want to send this report recurrently (like each day, week, month or year)
5.- Configure the email notification
6.- Done! The report will be send at the scheduled time.
You can see if an email has been scheduled (and when is going to be send) in the report list page