Child Benefit Deduction nearly trebled

The amount I have deducted from my tax codefor Child Benefit has increased from £1133 to £2941 for next years tax code. My circumstances haven't changed, I still only have a claim for one child. Can anyone explain why this would be. Also I'm a little confused that they are making a deduction from my tax code as I pay when I do a self assessment firm every year. Can anyone explan this too me? Any help or guidance would be much appreciated.

Hi,

The amount can be included in your tax code so that any amount due back is collected as the year progresses, rather than having the full amount to pay back when you complete the Self Assessment return.

We could not comment on your code as we can't access it from this forum.

If you wish to query the code you will need to contact our Income Tax team.

Income Tax: general enquiries

Thank you.