Hey HN,<p>I'm sure I'm not the first person among you who's been pulling their hair out trying to make sense of estimated quarterly taxes (and being too cheap to get help from a tax pro). Is there any sort of software out there that would make this process a little less painful? I checked Turbotax and others but I can't tell if they have any tool for this. Do you have any advice or tips?<p>Thanks a lot!