Thank you for the helpful suggestions and comments. The codes listed for the firm email address could work. We have several preparers; we like to direct a client to that preparer's email address, as one can in 1040, 1041, 706 and 709 products. It would seem like an easy cut & paste fix for ProSeries, where the coding is available in 1040, 1041 and others.  

To the comment re: ProSeries being a TAX software company, and getting the coding correct for calculations, that is, of course, the priority. The original post didn't suggest anything different, nor was a priority ranking requested. It's about being consistent across their product line and having a professional appearing product. The client letter is often the first page our clients see.