Ask HN: Software for calculating estimated quarterly taxes

Hey HN, 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? Thanks a lot!