Redundancy payment Vs tax year

LeRaven

Apologies if this is a common question but I had a look and couldn't see anything.

About to become embroiled in a fight with HMRC over a historic tax issue that's complicated by a redundancy payment. Here's the scenario:

I was made redundant from a role
My last official day of employment was march 31st 2018. I have a letter confirming that my employment ended on that day.

My former employer physically paid my redundancy payment at the end of April 2018

That means my employment ended in the 2017/18 tax year however the redundancy payment was made in the 2018/19 year and was taxed as such. The payment was well over the tax free amount available via redundancy and the amount over the £30k was taxed as though it was normal salary.

So my question is should the redundancy payment have been processed in the 2017/18 year as that's when my employment ended?

Masomnia

When it was paid.

LeRaven

Thank you very much