This setup lets me change the client name on the template letter (tiddler 2).
However, as alluded to I can't use wikitext formatting in the body of the letter: eg !*INCOME TAX ASSESSMENT 2018 *instead of *//**INCOME TAX ASSESSMENT 2018//.* -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/76a7b7a4-a658-4675-8a83-760ff04ef78e%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
