Cherry

Thank you for your reply. So if I don't telephone then my tax code will stay the same? Since I might want to keep it as is for the following year. And in that case my company would be unaware of any tax changes?

I am a dual tax resident of the UK and another country with a dual taxation agreement. I am employed by a UK company and pay UK income tax automatically. However, the tie-break questions determine that I should pay tax in the other country instead. After completing the self-assessment and claiming UK tax relief, will my UK tax code change so that I no longer automatically pay income tax in future? Will my company be aware that my tax situation has changed or at least changed for the previous year?