I just submitted my returns & realized that I did not add the fed & state taxes paid on unemployment benefits. I only included the amounts on my W-2 from my employer?

[ErnieS0]

The IRS and state may adjust your return because they have a record of the amount of tax withheld.

If they don't adjust your return, you'll have to amend. 

How do I amend my 2020 return?

Wait until you receive your federal and state refunds before amending. That way you'll know for sure that your return was not adjusted.