No. A 2020 tax return is what you use to report your 2020 income. You prepare and file a 2020 return in 2021, now that the tax year 2020 is over. All of the tax documents you enter on your 2020 return should say 2020 on them---like your W-2's, 1099's etc. You cannot enter income from any other year on a 2020 tax return. The current online software is only for 2020 returns----no other year.
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