Alexvod

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?