Redundancy 2 June 2021 at 10:23AM in Redundancy & redundancy planning

Bunny6336

I have been made redundant on 5th April 2021, but not paid until 20th April. My P45 is dated 5th April. As I didn’t receive the final salary including my redundancy money until 20th April, is my tax liability in 2021/2022 or 2020/2021?