Split Year Treatment/Form SA109

Do I need to complete Form SA109, asking for split year treatment if HMRC is already aware I have returned to live permanently in the UK? I was given a new tax code on my return.

Hi
The only way to claim split year treatment is complete a SA100 tax return and include supplementary page SA109 and any other relevant supplementary pages.  The alternative is to declare your world-wide income in your self assessment tax return.