Gary, I think you pitch this as look, you need to first get into compliance, so the books need to get done and then the tax returns get done. Once you do that, now you can move onto resolution.
For those that balk my sort of standard line is that they can do their bookkeeping. Get you a P&L and they can save the money. They wont like that either but its technically their problem. For some reason clients like to think they met you so now its somehow your issue. It isn’t.