I have a C Corporation that had a net operating loss in 2018 we were carrying forward. Now with the CARES act making the carryback a default for tax years 2018, 2019 and 2020, I have to amend to opt of of the carryback. I can see how you do this in the 2019 software, but not in the 2018 software which is the year I need to opt out using section 172(b)(3). How do I proceed? thank you!