I need help with an excess contribution to ROTH IRA in 2018... does my TurboTax subscription allow me access to someone who can help with that?

[jmc2021]

So how do you calculate the earnings on a 2020 over-contribution in order to withdraw them? How is the formula affected by the fact that a valid 2021 contribution has been made since?

[dmertz]

The full calculation method, including accounting for the subsequent contribution, is giving here:

https://www.law.cornell.edu/cfr/text/26/1.408-11