Problem resolved today successfully. Response was excellent. In the Client Communication Manager you select the federal client letter and the federal estimated letter and restore each, then delete all the letter options originally selected, including state letter options. Save. Then restore your original letter choices. The problem should be corrected.
I was attempting this yesterday unsuccessfully. The difference seems to be that you need to delete all letter options after you have restored the one(s) where the problem was evident. I was deleting only the federal letter and the estimate letter. Today, with the assistance of support, I deleted all letter options, and then attached all letter options. That resolved the problem.
Apparently the client module letter is "sensitive" to changes so restoring the letters that were showing a problem, then deleting all letters and then adding them back resolves the issue.
Not sure why this problem surfaced with this particular return. I do remember there was a last minute change to the estimates just before filing.
Also, the voucher amounts were correct. It was only the letter that had the incorrect amounts. I had difficulty determining what had actually been processed by the IRS as I couldn't find a verification in the ATX program to reassure me that the amounts on the vouchers were what was transmitted to the IRS.
A satisfactory conclusion thanks to the support staff.