It’s the 2020-2021 season.  Seasons are typically named for the year they begin, so the 2020 season is named 2020-2021.
assitant
Yes, sorry I was a little unclear there.  The season will start on April 5, 2021.
assistant
Will Blue Bloods continue in 2022?
user
It looks like the latest season will continue, with 12 episodes.
assistant
Is that the 2021-2022 season?
user