"In the future I will try a little more due diligence on my own before I bother the busy but helpful community."

Oh, nonsense; it's a great topic. I would recommend doing it here, though:

https://proconnect.intuit.com/community/practice-advice/discussion/02/214

The other comment I forgot to put is that, spending time on this client means not spending time with paying clients. It's not wrong to do something like this, for instance, as a type of marketing to them to give you their 500 corporate returns for Payment. Just don't overlook your true costs.