Try offering monthly accounting to them, collect necessary w9, most likely the client won’t want the service but you tell them you are moving into a different direction. Basically the client will fire themselves.
I'll be keeping my hairdresser. It's very simple, she receives a 1099 from owner, no other financial transactions such as product and rent. Besides, I need her for her mousse recommendations as I don't have the lustrous hair from years ago.
One of the reasons we always highlight the "This is your total tax" line rather than the refund (or balance due) line. We point it out as "this is what they get to keep" because that's the important part. We call refunds "this is the amount you loaned the feds last year" and balance due is "this is what's left to pay" - always focusing on total tax. We almost never have anyone complain about the refund amount. (The few that do are clueless and we had one this year complain about the "smaller refund" that was several thousand HIGHER!)