Took COVID 401K withdrawal in 2020 for which I received a 1099R. Will receive a 2021 1099R. How do I file on the distribution if I opted to pat taxes over three years?

Sorry question should have read as follows. Took COVID 401K withdrawal in 2020 for which I received a 1099R. Will I receive a 2021 1099R? How do I file on the distribution if I opted to pay taxes over three years?