I'm not sure what you mean what Fax service is this?
Only they can tell you that address. What is the company?
Sorry that is dental practice software I don'y know anything about that I and see nothing about Faxing there. I'll opt out good luck.
I see no one has helped you yet. I think since that is very particular software for your industry you should really get help from them: "You may reach our Support Department toll-free at(###) ###-#### ***** through Friday, between the hours of 8:00 a.m. to 5:30 p.m., CST. Our Technical Support Department answers calls on a first-come first-serve basis."
I don't see anything there that we can refer to that tells me how to help you with faxing: