HMRC Admin 5 Response

Hi

The deemed date for payments is outlined at Deemed date of contributions

Thank you

Hi Raymond Wong

Please refer to guidance at Paying tax on the remittance basis (Self Assessment helpsheet HS264)

Thank you
 

Hi yellow w

The date you arrived in the UK, is used for split year treatment purposes.  
Any world-wide income in the resident side of the split, should be declared in the self assessment tax return.  
We cannot advise the outcome of the residency tests or which tests will apply in your circumstances.  
This is something you need to decide for yourself or seek the advice of a professional, where you are unable to do so.

Thank you