Hi Mike,
The 60K threshold for higher income child benefit charge, HICBC, does not start until the 2024/25 tax year.
If your income is above £50K for 2023/24 and you are the higher earner then you will need to complete a Self Assessment tax return to calculate and pay the charge due.
If not yet registered you can register online at
Register for Self Assessment if you are not self-employed
Thank you.