even professional software does the same as TT desktop. next year based on prior year law with the ability to plug in numbers for the projection year. just like pro software, you can do 2021 projections but that would be based on the earlier tax law. I think what you fail to realize is that the tax laws can change widely from year to year making even a reasonable guess almost impossible for future years. the 2017 tax law changes that affects 2018-2025 would not have even been a wild guess back in 2016. so most people trying to get a 2018 estimate back in 2016 would have gotten results that were far from what 2018 actually turned out to be
