May be existing apps already do, but... If I could create my own, I would include a feature to keep track of everything that has to do with filing my taxes so

May be existing apps already do, but... If I could create my own, I would include a feature to keep track of everything that has to do with filing my taxes so that you know what to expect at the year end. I would also like to see a feature that can keep track of your investments and have like a pie chart of your asset allocation which I find to be very important.