Since the IRS can audit back 7 years and then go back another 3, I am concerned that if I have to revise an older return, that Turbotax is useless. I have the desk top CD's back to 1998 and if I were to need to revise a 2017 or worst case 2014 return, the only way would be to have left the last 10 years of installs on an old desktop machine?
