Hi there, @chefsusie.
Let me clear things out. Most of the time the error you've encountered occurs when the versions of the add-in are incompatible with the newer excel.
I recommend contacting Microsoft Tech support because they have the complete resources to figure out the root cause of the error.
Additionally, I'll provide articles below for future reference:
If you need further assistance with exporting the W-2 e-file or any related concerns, don't hesitate to reply to this post. Take care!
