Thanks all for your replies.
Sorry that I should make it clear.
I already filed my tax on 3/20/2022 for 2021 taxes.
I guess I will need to report the excess contribution of $200 and amend my 2020 return to pay 6% penalty for this excess because I did not withdraw $200 before 10/15/2021.
I am just confused about the excess contribution of $6000 to Roth IRA in 2021, the excess withdrawal is not complete yet because the financial institution is still calculating it. I have filled out the form requesting to withdraw $200 for tax year 2020 and $6000 for tax year 2021, but he just replied me that the withdrawal is $4680 due to investment loss. therefore, I don't know what I should do.
Based on what you said, it seems that I have to instruct them to withdraw $200 for 2020 and $6000 for 2021 because if I only withdrew $4,680, the difference of $1,520 ($6,200-$4,680) will still be considered as excess contribution.
As long as the withdrawal is completed by 10/15/2022 for 2020 and 2021 excess contribution, I don't need to pay 6% penalty for those 2020 and 2021 excess contribution.
Please feel free to correct me if I am not right, thanks!
