Self Assessment - High Income Child Benefit

Filling a self assessment for 6 April 2022 and ending 5 April 2023 due to High Income Child benefit, switch employer during tax year. Last employment: Earnings of £15,855 Paid £2328 tax Current employment: £37,196 Paid £6296 tax Total earnings for year 22-23 were £53,051 on which paid £8624tax HMRC calculates that total amount due is £620 for the Child benefit of £1133 which doesn’t seems correct as the expected amount due should be £345 approximately Please advise as we are approaching the deadline. Thanks

Hi Sheraz Khan,
From the figures supplied the Higher Income Child Benefit Charge, HICBC, should be £345 approximately.
As the balance due is higher then there will be an underpayment of tax which has increased the balance.
To review we would need to check your calculation.
If you submit the tax return and allow the 3 working days to process to our systems and contact us we can review.
If an amendment is needed this can be done. 
Thank you.