If it's not clear,
you have to amend your 2021 tax return to remove 2020 income.
If you just e-Filed, you can e-File your amendment.
You have to file a separate 2020 return with your 2020 income.
You'll have to file that on paper via US Mail.
There is no penalty to file 2020 tax return late if you are getting a refund.
