After you file

Yes, you can amend your tax return and add the income. @ASlrien46

If you have already filed your tax return and it was accepted, you need to amend your return to make this correction. 

If you used TurboTax Online:

1. Log in to your account and select 2021, then Amend using TurboTax Online.
2. Answer the first few questions, then select your reason for amending.
3. Add or edit the information you need to change.
4. Continue until you have answered all of the questions, including the explanation for the amendment. Do not submit your amendment until your original return is processed. 

If you used our CD/download product:

1. Sign back into your return and select “Amend a filed return.”
2. Answer the first few questions, then select your reason for amending.
3. Add or edit the information you need to change.
4. Continue until you have answered all of the questions, including the explanation for the amendment. Do not submit your amendment until your original return is processed.