Unable to Calculate Return in Technical questions Posted April 18 · Report reply After playing with this problem some more, I found out what was causing the problem. The problem is with the "Continue on Recent" button. If I open my tax file by pressing the "Continue on Recent" button, I always get the problem. If I click on the "Open An Existing File" button, and select my data file, I don't have any problem Reviewing or Generating the Tax return. It does not matter where the data file exists. It can be saved in the same folder where the UFile Software in installed. Hope this will help Ufile fix the problem.