I was claiming child benefit during April 23/24 tax year while the higher earner threshold was at the lower rate. My partners salary fluctuates due to performance related bonuses and when i realised his annual income would be above the threshold I cancelled the payments. The last payment I received was January 2024. I received a letter from HMRC to state payments had been cancelled and if my circumstances changed to contact them.
How do I pay back the money? Do I need to complete a tax return? I completed a tax return for April 22/23 as he earnt between £50-£60k. April 23/24 he earnt £65k.