CMcM2024

I have recently applied for Child Benefit (Aug 2024) but have not yet received any confirmation in regards to my application and have not received any payments. My husband is a higher earner, and I am aware that he will need to complete a self assessment for the High Income Charge. I note that the deadline to register for Self Assessment for this year is 5 October 2024, but as we have not received any payments to date, does he need to register for Self Assessment? If he does not need to register, what does he need to do for this tax year, if child benefit payments are received?