I know this issue was posted and resolved in 2022, but I seem to be running into the exact same issue this year. I'm using TT Premier Desktop (Mac), and even when I check for updates it says I'm up to date. When I do the Smart Check if circles me to the same "Sum of losses in individual years should not be greater then total loss" error. And even after I update the passive losses section for prior years, the total doesn't update to reflect any changes. What is the workaround or fix for this?
