Hello, mjore.
Thanks for reaching out for support here in the Community. I'd be glad to provide some insight on your question about moving subcustomers into a subfile.
I can see how moving subcustomers to a subfile through a batch action would be beneficial and could help keep these particular customers organized. At this time, this type of action isn't currently available in QuickBooks Online. I'll make sure to pass your suggestion along to the Product Development Team.
Keep an eye out for updates, like a subfile feature, and other news in the QuickBooks Blog, here: https://quickbooks.intuit.com/blog/.
I wish you continued success. Feel free to let me know if you have any other questions.
