Full time employment overseas. Informing HMRC

I have been offered a full time job overseas which will take place in 2023-2024 tax year .Based on my working hours and days in the UK I understand that I am qualified for the Third automatic overseas test for non residency. My question is shall I inform HMRC about the job or non residency before my assignment for instance in March 2023,if yes then how to do it such as sending a form SA 109 etc ,or it is not required at this stage?

Hi,

As it is in the future, circumstances may change so you would only notify us when it actually happens. you can complete form P85 to so this.

Get your Income Tax right if you're leaving the UK

Thank you.