I already sent an email to support@ufile.com and I have not receive any response, so I will try to do it in this way to see if I got an answer from UFILE.
I need file a tax return for prior years for someone else for the years of 2013, 2014, 2015 but I need the UFILE software for these specific years. I have use UFILE for many many years and I have the keys for these software, but I do not have the software itself. Can Ufile send me the software for these years in order that I can do the filing of the tax return that I need