Dates for what exactly? Date placed in service? Date of conversion? Date of an improvement maybe? What "new input" are you talking about? If you're working on your 2021 taxes, then any data you enter would be for 2021 only - not 2020.
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@Carl - there are 2 boxes on those screens (rent, utility, repair expenses, insurance expenses, other expenses). Had you gone to take a brief look for yourself you would know exactly what I was talking about. Your response reflects someone who is frustrated and doesn't like their job or the people you have to provide customer service to. As I mentioned, the old information they are comparing 'this year's info to is 2019 and not 2020. And instead of the 'newest' box being 2021, it says 2020. If you weren't too busy being dense and rifling off a ridiculous response, you might have slowed down long to understand what I was referring to. I can't believe you actually hit send on that reply. I've been using Intuit products for about 6 years now, and this response is making me rethink my self-employment accounting tools for the future.