There are many tax software packages available to do this, but they are extremely expensive and used primarily by financial planners and tax preparers. Lacerte, BNA, and Intuit ProConnect come to mind. These professional packages try to stay up to date. For TurboTax, which is geared towards individual users, they try to incorporate all major tax changes so it comes late. Congress often makes tax changes late in the year! I often use the method of copying the prior year files (i.e. 2019play) and tweak the numbers to get a projection for my personal taxes. The only year this was WAY off was 2018 because of the misnomed tax cuts and jobs act. If you absolutely need accuracy, go to a professional. They have the tools (for which they pay a lot) and the expertise to help you.
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