Find and select the name of the contractor to open his/her profile.
Click the Send a reminder hyperlink.
Select the Send button in the Send a reminder window.
I've attached screenshots below for your reference.
Once your contractor completed the W9 form, you're able to view and download the file through their profile's Documents tab. Please see the attached screenshot below.
Additionally, you can check out this article to learn more about the forms and associated taxes for contractors: Instructions for independent contractors. It includes topics about Form W9 and 1099s to name a few.
Fortunately I understand all of that however I've done all of that and sent the reminder so this will be the 3rd invitation and can't figure out how to do that 3rd one as it won't give me that option send him another one. Is there a way to send it after the reminder as again there is not option.