Reclaim overpaid NI

I am due a partial refund of Class 4 NI for tax year 2022/23 due to carried back loss from tax year 2023/24. i have completed my self -assessment return for 203/24 and have received a refund of overpaid income tax, but I have not received a refund on the associated overpaid class 4 NI contributions. I have looked at form CA 5610 but it doesn't ask for enough details - all it wants to know is how much total class 2 and class 4 I have paid in the tax year, the form doesn't aske for how much I want repaying or why I want the repayment (despite the introductory section of the form saying that it will ask for both of these details). I'm not due a full refund of the class 4 just a partial refund but there doesn't seem to be a way of giving these details. Please help.

Hi,

Unfortunately we cannot look at individual accounts through the customer forum. You will need to contact the National Insurance team for further guidance.  

National Insurance: general enquiries

Thank you.