I believe the primary reason is that there's a pretty big industry around tax preparation that's making that difficult.[0] I've also heard arguments that there

I believe the primary reason is that there's a pretty big industry around tax preparation that's making that difficult.[0] I've also heard arguments that there are anti-tax motivations that want to keep it difficult so people view taxes more negatively. I don't have any info on the latter, so take that with your daily recommended allowance of sodium chloride. [0]: https://techcrunch.com/2013/03/27/turbotax-maker-funnels-millions-to-lobby-against-easier-tax-returns/ https://techcrunch.com/2013/03/27/turbotax-maker-funnels-mil...