Hi Barnet,
If either you or your partner earn over £50,000 then you may still be able to claim Child Benefit Credits to maintain your National Insurance account for the State Pension.
You may wish to call the Child Benefit Office Helpline on 0300 200 3100 and they will be able to help you with any Child Benefit queries.
The following weblink gives more information about this:
Child Benefit
Thank you.