We have done all of this with a QB Tech support person working with us and none of it corrected the problem. Moderators keep responding to this issue with the same information, which does not acknowledge that something was "broken" with Customer letter creation sometime in January.  Everyone of us who reported this was able to create Customer letters in early January,  Then it just stopped working.  This is not an issue of all of us doing needing to check compatibility or rebuild or company files.  This is something that QB needs to look into quickly and address.

We were using QB Premier 2022, Windows 11, and Microsoft Office for Home and Business 2022 on the 2 computers it stopped working on.  

Customer letters is a vital part of our everyday operations and this issue has cost us significantly.  We finally tried using older versions of Microsoft Word and were able to get letters created with Office 2013.  No version above that works for us with QB Premier 2022 anymore .

Something changed in QB. 2022.  

It is not helpful for QB moderators to  keep posting the same non working solutions and telling us to keep re-reporting the same issue over and over again..