After you file

@VolvoGirl , thanks for the suggestion. It worked like a charm, and now I could use the file to import into TT 2019. 

 

@padm , I also tried adding the .tax2018 extension to the file inside the zip file earlier. But based on the above suggestion, I just renamed the file from .tax2018.zip to .tax2018 and it works. Please try and see if it helps.