Contributed in 2020, but for which tax year?

I like and recommend investopedia articles, as well as investment agency articles (such as Fidelity or Schwab) because they are written in basic English. Examples:

https://www.investopedia.com/what-to-do-if-you-contribute-too-much-to-your-roth-ira-4770686

https://www.investopedia.com/articles/retirement/04/042804.asp

Just google:

excess roth