Not sure what you are trying to do. The online software is only for 2021 returns --- you cannot change or "re-set" the year. And you cannot import information to a past year return. If you are working on a past year return (which can only be done using the CD/download software for the specific year) then you will not be able to import data because the sites that allow that only have data available for 2021 now.
What "new documents" are you trying to do something with? What exactly are you trying to do?
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