I realize many folk do not need to file estimated taxes, so this question is aimed at those who do and Turbo Tax employees who handle customer complaints. I have used Turbo Tax for many years, since at least 2004. Every year I provide feedback to the effect that the Turbo Tax interview and sub-topics for estimated taxes are woefully inadequate. IMHO they need to provide people the ability to easily modify changes to the prior year in dramatically more granular detail than they do today. It is so aggravating.