NAPLAN was cancelled for 2020 and it is back on this year. This year it will be divided into online and paper version. 2021 is also the last year that paper based test will be carried out.
2021 NAPLAN online version of the test will happen between 11–21 May.
2021 NAPLAN written version of the test will happen between 11–13 May.
I personally cannot wait for the new data to become available. Unfortunately, I will probably have to wait until early 2022 to get my hands on the 2021 data.