If the schedule C is a single member LLC, they need to file.

Only if they are an LLC, single member

Are you contacting all clients to tell them to send this report?

What about Sch E -- owners are often LLCs for liability protection.

The owners of 1065, 1020-S, Sch C, E are already visible, as per K-1s. So other than 1120-C, why is this being asked?

Anyone that had to register with their secretary of state when they formed their business entity, I believe some states DO require this of sole props, at least thats what they told me in the CEs I took last year.

Do you contact your clients so they file this Beneficial Ownership report?

We are currently in the process of letting our clients know that it is out there.

I'm practicing filing the report for my company, an S-corp. Was swimming right along until they asked me to drag my driver license into my ID document question, and I don't know how to do that (:

You need to scan a copy of your license and then you will have a pdf file to complete the process

Here is a link. https://www.fincen.gov/boi-faqs