Welcome to the RingCentral Community

In the RingCentral app, there's no option to customize the cover page yet. It's best to add it first in your Personal contacts so that when you enable Cover Page, it will automatically fill out information such as Name, To, and From. Then you can type other details in "Cover page notes.

When I send a fax to a contact, the "TO" information does not populate. Any suggestions?

Hi @MaryBeth (MB) VanTill, there is now an option to create a custom cover page in the RingCentral app. You can check the KB article link below.
https://support.ringcentral.com/article/creating-custom-fax-cover-page.html

With RC desktop phone app you can customize cover page

https://support.ringcentral.com/article/Fax-Create-a-Custom-Fax-Cover-Page-RingCentral-Phone.html

You can put cover page name, details, description, name, address, company name, contact etc